|
|
St. Louis, Missouri
This is a spaceborne radar i
…
3/28/96
| Date |
3/28/96 |
| Description |
This is a spaceborne radar image of the area surrounding St. Louis, Missouri, where the Mississippi and Missouri Rivers come together. The city of St. Louis is the bright gold area within a bend in the Mississippi River at the lower center of the image. The rivers show up as dark blue sinuous lines. Urbanized areas appear bright gold and forested areas are shown as a brownish color. Several bridges can be seen spanning the river near downtown St. Louis. The Missouri River flows east, from left to right, across the center of the image, and meets the Mississippi River, which flows from top to bottom of the image. A small stretch of the Illinois River is shown at the top of the image where it merges with the Mississippi. The Mississippi forms the state boundary between Illinois (to the right) and Missouri (to the left). Flat farmland areas within the river floodplains appear blue on the image. The major roadways that pass through the area can be seen radiating out from, and encircling, the city of St. Louis. These highways, the rivers and the bridges help maintain St. Louis' reputation as the "Gateway to the West." This image was acquired by the Spaceborne Imaging Radar-C/X-band Synthetic Aperture Radar (SIR-C/X-SAR) on April 17, 1994, onboard the space shuttle Endeavour. The image is 74 kilometers by 92 kilometers (46 miles by 57 miles) and is centered at 38.75 degrees south latitude, 90.38 degrees east longitude. North is toward the upper right. The colors are assigned to different radar frequencies and polarizations as follows: red is L-band, horizontally transmitted and received, green is C-band, horizontally transmitted and received, and blue is the ratio of L-band and C-band, horizontally transmitted and received. SIR- C/X-SAR, a joint mission of the German, Italian and United States space agencies, is part of NASA's program to study Earth and its environment, known as the Office of Mission to Planet Earth. ##### |
|
The Mark of a Dying Star
| Title |
The Mark of a Dying Star |
| Description |
Six hundred and fifty light-years away in the constellation Aquarius, a dead star about the size of Earth, is refusing to fade away peacefully. In death, it is spewing out massive amounts of hot gas and intense ultraviolet radiation, creating a spectacular object called a "planetary nebula." In this false-color image, NASA's Hubble and Spitzer Space Telescopes have teamed up to capture the complex structure of the object, called the Helix nebula, in unprecedented detail. The composite picture is made up of visible data from Hubble and infrared data from Spitzer. The dead star, called a white dwarf, can be seen at the center of the image as a white dot. All of the colorful gaseous material seen in the image was once part of the central star, but was lost in the death throes of the star on its way to becoming a white dwarf. The intense ultraviolet radiation being released by the white dwarf is heating and destabilizing the molecules in its surrounding environment, starting from the inside out. Like an electric stovetop slowly heating up from the center first, the hottest and most unstable gas molecules can be seen at the center of the nebula as wisps of blue. The transition to more stable and cooler molecules is clearly depicted as the color of the gas changes from very hot (blue) to hot (yellow) and warm (red). A striking feature of the Helix, first revealed by ground-based images, is its collection of thousands of filamentary structures, or strands of gas. In this image the filaments can be seen under the transparent blue gas as red lines radiating out from the center. Astronomers believe that the molecules in these filaments are able to stay cooler and more stable because dense clumps of materials are shielding them from ultraviolet radiation. This image is a composite showing ionized H-alpha (green) and O III (blue) gases from the Hubble Space Telescope, and molecular hydrogen (red) from Spitzer observations at 4.5 and 8.0 microns. |
|
The Mark of a Dying Star
| Title |
The Mark of a Dying Star |
| Description |
Six hundred and fifty light-years away in the constellation Aquarius, a dead star about the size of Earth, is refusing to fade away peacefully. In death, it is spewing out massive amounts of hot gas and intense ultraviolet radiation, creating a spectacular object called a "planetary nebula." In this false-color image, NASA's Hubble and Spitzer Space Telescopes have teamed up to capture the complex structure of the object, called the Helix nebula, in unprecedented detail. The composite picture is made up of visible data from Hubble and infrared data from Spitzer. The dead star, called a white dwarf, can be seen at the center of the image as a white dot. All of the colorful gaseous material seen in the image was once part of the central star, but was lost in the death throes of the star on its way to becoming a white dwarf. The intense ultraviolet radiation being released by the white dwarf is heating and destabilizing the molecules in its surrounding environment, starting from the inside out. Like an electric stovetop slowly heating up from the center first, the hottest and most unstable gas molecules can be seen at the center of the nebula as wisps of blue. The transition to more stable and cooler molecules is clearly depicted as the color of the gas changes from very hot (blue) to hot (yellow) and warm (red). A striking feature of the Helix, first revealed by ground-based images, is its collection of thousands of filamentary structures, or strands of gas. In this image the filaments can be seen under the transparent blue gas as red lines radiating out from the center. Astronomers believe that the molecules in these filaments are able to stay cooler and more stable because dense clumps of materials are shielding them from ultraviolet radiation. This image is a composite showing ionized H-alpha (green) and O III (blue) gases from the Hubble Space Telescope, and molecular hydrogen (red) from Spitzer observations at 4.5 and 8.0 microns. |
|
Dr. Mae C. Jemison, First Af
…
| Title |
Dr. Mae C. Jemison, First African-American Woman in Space |
| Full Description |
The first African-American woman in space, Dr. Mae C. Jemison was born on October 17, 1956 in Decatur, Alabama but considers Chicago, Illinois her hometown. She received a Bachelor in Chemical Engineering (and completed the requirements for a Bachelor in African and Afro-American studies) at Stanford University in 1977. Dr. Jemison also received a Doctorate degree in medicine from Cornell University in 1981. After medical school she did post graduate medical training at the Los Angeles County University of Southern California Medical Center. As an area Peace Corps medical officer for Sierra Leone and Liberia in West Africa, she managed the health care delivery system for U.S. Peace Corps and U.S. Embassy personnel. Jemison's background includes work in the areas of nuclear magnetic resonance spectroscopy, and reproductive biology. She also developed and participated in research projects on the Hepatitis B vaccine and rabies. Jemison was a General Practitioner and attending graduate Engineering classes in Los Angeles when she was named an astronaut candidate in 1987. She flew her first flight as a science mission specialist on STS-47, Spacelab-J, in September 1992. She was co-investigator for the Bone Cell Research Experiment on that mission. In completing her first space flight, Jemison logged 190 hours, 30 minutes and 23 seconds in space. Jemison resigned from NASA in March 1993. In 1994, she founded and began a term as chair of The Earth We Share (TEWS), an annual international science camp where students, aged 12 to 16, work together to solve current global dilemmas. From 1995- 2002 she was a professor of Environmental Studies at Dartmouth College. She is currently director of the Jemison Institute for Advancing Technology in developing countries. She is the recipient of numerous awards and honors, including induction into the National Women's Hall of Fame and several corporate boards of directors on the Texas Governor's State Council for Science and Biotechnology Development. Dr. Jemison published her memoirs, Find Where DE:the Wind Goes:Moments from My Life in 2001. She currently resides in Houston, Texas. |
| Date |
07/1992 |
| NASA Center |
Johnson Space Center |
|
Female Astronauts
| Title |
Female Astronauts |
| Full Description |
Astronauts Dr. N. Jan Davis (left) and Dr. Mae C. Jemison (right) were mission specialists on board the STS-47 mission. Born on November 1, 1953 in Cocoa Beach, Florida, Dr. N. Jan Davis received a Master degree in Mechanical Engineering in 1983 followed by a Doctorate in Engineering from the University of Alabama in Huntsville in 1985. In 1979 she joined NASA Marshall Space Flight Center as an aerospace engineer. A veteran of three space flights, Dr. Davis has logged over 678 hours in space since becoming an astronaut in 1987. She flew as a mission specialist on STS-47 in 1992 and STS-60 in 1994, and was the payload commander on STS-85 in 1997. In July 1999, she transferred to the Marshall Space Flight Center, where she became Director of Flight Projects. Dr. Mae C. Jemison, the first African-American woman in space, was born on October 17, 1956 in Decatur, Alabama but considers Chicago, Illinois her hometown. She received a Bachelor degree in Chemical Engineering (and completed the requirements for a Bachelor degree in African and Afro-American studies) at Stanford University in 1977, and a Doctorate degree in medicine from Cornell University in 1981. After receiving her doctorate, she worked as a General Practitioner while attending graduate engineering classes in Los Angeles. She was named an astronaut candidate in 1987, and flew her first flight as a science mission specialists on STS-47, Spacelab-J, in September 1992, logging 190 hours, 30 minutes, 23 seconds in space. In March 1993, Dr. Jemison resigned from NASA, thought she still resides in Houston, Texas. She went on to publish her memoirs, Find Where the Wind Goes: Moments from My Life, in 2001. The astronauts are shown preparing to deploy the lower body negative pressure (LBNP) apparatus in this 35mm frame taken in the science module aboard the Earth-orbiting Space Shuttle Endeavor. Fellow astronauts Robert L. Gibson (Commander), Curtis L. Brown (Junior Pilot), Mark C. Lee (Payload Commander), Jay Apt (Mission Specialist), and Mamoru Mohri (Payload Specialist) joined the two on their maiden space flight. The Spacelab-J mission was a joint effort between Japan and the United States. |
| Date |
09/15/1992 |
| NASA Center |
Johnson Space Center |
|
Hubble Photographs 'Double B
…
| Title |
Hubble Photographs 'Double Bubble' in Neighboring Galaxy |
| General Information |
What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. Back to top [ #top ] |
|
Iridescent Glory of Nearby P
…
| Title |
Iridescent Glory of Nearby Planetary Nebula Showcased on Astronomy Day |
|
Celestial Fireworks
| Title |
Celestial Fireworks |
| General Information |
What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. Back to top [ #top ] |
|
Astronomers Use Innovative T
…
| Title |
Astronomers Use Innovative Technique to Find Extrasolar Planet |
|
Hubble Studies Generations o
…
| Title |
Hubble Studies Generations of Star Formation in Neighboring Galaxy |
| General Information |
What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. Back to top [ #top ] |
|
A New Twist on an Old Nebula
| Title |
A New Twist on an Old Nebula |
|
A New Twist on an Old Nebula
| Title |
A New Twist on an Old Nebula |
|
Astronomers Use Innovative T
…
| Title |
Astronomers Use Innovative Technique to Find Extrasolar Planet |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Sears Tower |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the ground. |
| Completed |
2001-04-10 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Sears Tower |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the ground. |
| Completed |
2001-04-10 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Sears Tower |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the ground. |
| Completed |
2001-04-10 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Sears Tower |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the ground. |
| Completed |
2001-04-10 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Sears Tower |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the ground. |
| Completed |
2001-04-10 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Sears Tower |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the ground. |
| Completed |
2001-04-10 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Sears Tower |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the ground. |
| Completed |
2001-04-10 |
|
Neutron Star Collision
| Title |
Neutron Star Collision |
| Abstract |
Systems of orbiting neutron stars are born when the cores of two old stars collapse in supernova explosions. Neutron stars have the mass of our Sun but are the size of a city, so dense that boundaries between atoms disappear. Einstein's theory of general relativity predicts that the orbit shrinks from ripples of space-time called gravitational waves. After about 1 billion simulation years, the two neutron stars closely circle each other at 60,000 revolutions per minute. The stars finally merge in a few milliseconds, sending out a burst of gravitational waves. |
| Completed |
1999-01-21 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Adler Planetarium |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the Adler Planetarium. The Adler Planetarium and Astronomy Museum in Chicago, Illinois was built in 1930 by philanthropist Max Adler. It is located on the shore of Lake Michigan near the Shedd Aquarium, the Field Museum of Natural History, and Soldier Field. |
| Completed |
2006-11-03 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Adler Planetarium |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the Adler Planetarium. The Adler Planetarium and Astronomy Museum in Chicago, Illinois was built in 1930 by philanthropist Max Adler. It is located on the shore of Lake Michigan near the Shedd Aquarium, the Field Museum of Natural History, and Soldier Field. |
| Completed |
2006-11-03 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Adler Planetarium |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the Adler Planetarium. The Adler Planetarium and Astronomy Museum in Chicago, Illinois was built in 1930 by philanthropist Max Adler. It is located on the shore of Lake Michigan near the Shedd Aquarium, the Field Museum of Natural History, and Soldier Field. |
| Completed |
2006-11-03 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Adler Planetarium |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the Adler Planetarium. The Adler Planetarium and Astronomy Museum in Chicago, Illinois was built in 1930 by philanthropist Max Adler. It is located on the shore of Lake Michigan near the Shedd Aquarium, the Field Museum of Natural History, and Soldier Field. |
| Completed |
2006-11-03 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Adler Planetarium |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the Adler Planetarium. The Adler Planetarium and Astronomy Museum in Chicago, Illinois was built in 1930 by philanthropist Max Adler. It is located on the shore of Lake Michigan near the Shedd Aquarium, the Field Museum of Natural History, and Soldier Field. |
| Completed |
2006-11-03 |
|
Great Zoom into Chicago, IL:
…
| Title |
Great Zoom into Chicago, IL: The Adler Planetarium |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the Adler Planetarium. The Adler Planetarium and Astronomy Museum in Chicago, Illinois was built in 1930 by philanthropist Max Adler. It is located on the shore of Lake Michigan near the Shedd Aquarium, the Field Museum of Natural History, and Soldier Field. |
| Completed |
2006-11-03 |
|
Great Zoom out of Chicago, I
…
| Title |
Great Zoom out of Chicago, IL: The Sears Tower |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the ground. |
| Completed |
2001-04-10 |
|
Great Zoom out of Chicago, I
…
| Title |
Great Zoom out of Chicago, IL: The Adler Planetarium |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the Adler Planetarium. The Adler Planetarium and Astronomy Museum in Chicago, Illinois was built in 1930 by philanthropist Max Adler. It is located on the shore of Lake Michigan near the Shedd Aquarium, the Field Museum of Natural History, and Soldier Field. |
| Completed |
2006-11-03 |
|
Great Zoom out of Chicago, I
…
| Title |
Great Zoom out of Chicago, IL: The Adler Planetarium |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the Adler Planetarium. The Adler Planetarium and Astronomy Museum in Chicago, Illinois was built in 1930 by philanthropist Max Adler. It is located on the shore of Lake Michigan near the Shedd Aquarium, the Field Museum of Natural History, and Soldier Field. |
| Completed |
2006-11-03 |
|
Great Zoom out of Chicago, I
…
| Title |
Great Zoom out of Chicago, IL: The Adler Planetarium |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the Adler Planetarium. The Adler Planetarium and Astronomy Museum in Chicago, Illinois was built in 1930 by philanthropist Max Adler. It is located on the shore of Lake Michigan near the Shedd Aquarium, the Field Museum of Natural History, and Soldier Field. |
| Completed |
2006-11-03 |
|
Great Zoom out of Chicago, I
…
| Title |
Great Zoom out of Chicago, IL: The Adler Planetarium |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the Adler Planetarium. The Adler Planetarium and Astronomy Museum in Chicago, Illinois was built in 1930 by philanthropist Max Adler. It is located on the shore of Lake Michigan near the Shedd Aquarium, the Field Museum of Natural History, and Soldier Field. |
| Completed |
2006-11-03 |
|
Great Zoom out of Chicago, I
…
| Title |
Great Zoom out of Chicago, IL: The Adler Planetarium |
| Abstract |
Using data from different spacecraft and some powerful computer technology, visualizers at the Goddard Space Flight Center present you with a collection of American cities in a way you have never seen them before. Starting with our camera high above the Earth, we rush in towards the surface at what would be an impossible speed for any known vehicle. Passing though layers of atmosphere, the colors of our destinations shimmer with their own unique characteristics, and suddenly we find ourselves floating in virtual space just above the Adler Planetarium. The Adler Planetarium and Astronomy Museum in Chicago, Illinois was built in 1930 by philanthropist Max Adler. It is located on the shore of Lake Michigan near the Shedd Aquarium, the Field Museum of Natural History, and Soldier Field. |
| Completed |
2006-11-03 |
|
Before and During the Great
…
| Title |
Before and During the Great Mississippi Flood of 1993 |
| Abstract |
During the first half of 1993, heavy rains in the midwest United States caused the greatest flood ever recorded on the Upper Mississippi. The Mississippi River remained above flood stage from April through September of that year, and many of the dykes and water control systems along the rivers in this region were overwhelmed. These images from the Landsat-5 Thematic Mapper clearly show the flooded regions near St. Louis. The pink areas near the flooded regions show the scoured land from which the flood waters have receded. A comparison of the image during the flood with an image from a year before clearly shows the preponderance of cultivated fields in the lowland flooded region, evidence that floods and river meanderings have deposited rich soil in these regions in the past. |
| Completed |
2006-04-04 |
|
STS-36 Shuttle in Mate-Demat
…
| Photo Description |
A close-up, front view of the Space Shuttle Atlantis in the Mate-Demate Device (MDD) as technicians work to prepare the orbiter for its ferry flight from NASA's Ames-Dryden Flight Research Facility (later, the Dryden Flight Research Center) to the Kennedy Space Center, Florida. The 100-foot-high, steel-truss, cantilevered facility is capable of precision positioning more than 220,000 pounds and is used to raise the orbiters onto jacks for ferry-flight servicing, and then hoist them higher to mate them atop the NASA 747 Shuttle Carrier Aircraft (SCA). The MDD, which features three separate hoist units, each capable of lifting 100,000 pounds, was designed by Connell Associates, Inc., Coral Gables, Florida, and built be the George A. Fuller Co., Chicago, Illinois, at a cost of $1.7 million. |
| Project Description |
470,000 pounds. The engines burn a mixture of liquid oxygen and liquid hydrogen. In orbit, the Space Shuttles circle the earth at a speed of 17,500 miles per hour with each orbit taking about 90 minutes. A Space Shuttle crew sees a sunrise or sunset every 45 minutes. When Space Shuttle flights began in April 1981, Dryden Flight Research Center, Edwards, California, was the primary landing site for the Shuttles. Now Kennedy Space Center, Florida, is the primary landing site with Dryden remaining as the principal alternate landing site., Space Shuttles are the main element of America?s Space Transportation System and are used for space research and other space applications. The shuttles are the first vehicles capable of being launched into space and returning to Earth on a routine basis. Space Shuttles are used as orbiting laboratories in which scientists and mission specialists conduct a wide variety of scientific experiments. Crews aboard shuttles place satellites in orbit, rendezvous with satellites to carry out repair missions and return them to space, and retrieve satellites and return them to Earth for refurbishment and reuse. Space Shuttles are true aerospace vehicles. They leave Earth and its atmosphere under rocket power provided by three liquid-propellant main engines with two solid-propellant boosters attached plus an external liquid-fuel tank. After their orbital missions, they streak back through the atmosphere and land like airplanes. The returning shuttles, however, land like gliders, without power and on runways. Other rockets can place heavy payloads into orbit, but, they can only be used once. Space Shuttles are designed to be continually reused. When Space Shuttles are used to transport complete scientific laboratories into space, the laboratories remain inside the payload bay throughout the mission. They are then removed after the Space Shuttle returns to Earth and can be reused on future flights. Some of these orbital laboratories, like the Spacelab, provide facilities for several specialists to conduct experiments in such fields as medicine, astronomy, and materials manufacturing. Some types of satellites deployed by Space Shuttles include those involved in environmental and resources protection, astronomy, weather forecasting, navigation, oceanographic studies, and other scientific fields. The Space Shuttles can also launch spacecraft into orbits higher than the Shuttle?s altitude limit through the use of Inertial Upper Stage (IUS) propulsion units. After release from the Space Shuttle payload bay, the IUS is ignited to carry the spacecraft into deep space. The Space Shuttles are also being used to carry elements of the International Space Station into space where they are assembled in orbit. The Space Shuttles were built by Rockwell International?s Space Transportation Systems Division, Downey, California. Rockwell?s Rocketdyne Division (now part of Boeing) builds the three main engines, and Thiokol, Brigham City, Utah, makes the solid rocket booster motors. Martin Marietta Corporation (now Lockheed Martin), New Orleans, Louisiana, makes the external tanks. Each orbiter (Space Shuttle) is 121 feet long, has a wingspan of 78 feet, and a height of 57 feet. The Space Shuttle is approximately the size of a DC-9 commercial airliner and can carry a payload of 65,000 pounds into orbit. The payload bay is 60 feet long and 15 feet in diameter. Each main engine is capable of producing a sea level thrust of 375,000 pounds and a vacuum (orbital) thrust of |
| Photo Date |
March 1990 |
|
Mass Measurement - Skylab St
…
| Name of Image |
Mass Measurement - Skylab Student Experiment ED-74 |
| Date of Image |
1973-01-01 |
| Full Description |
Vincent W. Converse of Rockford, Illinois proposed Skylab's student experiment ED-74, Mass Measurement, to measure mass in a weightless environment. This chart describes Converse's experiment. Mass is the quantity of matter in any object. The gravitational force between an object and the Earth is called weight, which is a result of the Earth's gravity acting upon the object's mass. Even though objects in Skylab were apparently weightless, their mass properties were unchanged. Measurement of mass is therefore an acceptable alternative to measurement of weight. The devices used in this experiment provided accurate mass measurements of the astronauts' weights, intakes, and body wastes throughout the missions. In March 1972, NASA and the National Science Teachers Association selected 25 experiment proposals for flight on Skylab. Science advisors from the Marshall Space Flight Center aided and assisted the students in developing the proposals for flight on Skylab. |
|
Earth-to-Orbit Education Pro
…
| Name of Image |
Earth-to-Orbit Education Program "Makes Science Cool |
| Date of Image |
2002-05-17 |
| Full Description |
In this photograph, students from all over the country gathered and discussed their Earth-to-Orbit (ETO) Design Challenge project at NASA Marshall Space Flight Center in Huntsville, Alabama. These students who are just "typical teens," have been spending their time tackling some of the same challenges NASA engineers face when designing propulsion systems at MSFC. The ETO Design Challenge is a hands-on educational program, targeted to middle school students, in which students are assigned a project engaging in related design challenges in their classrooms under the supervision of their teachers. The project is valuable because it can be used by any student, and any teacher, even those without technical backgrounds. Student in 12 states: Alabama, Arkansas, California, Colorado, Illinois, Missouri, Montana, New York, Ohio, Ternessee, Virginia, and Washington, are taking part in MSFC's Earth-to-Orbit program. NASA uses such programs to support educational excellence while participating in educational outreach programs through centers around the country. One of the students' teachers, Joanne Fluvog, commented, "the biggest change I've seen is in the students' motivation and their belief in their ability to think." Justin O'Connor and Jeff Alden, students of Lane Middle School in Portland, Oregon, participated in the ETO program and said being involved in a real engineering project has made them realize that "science is cool. |
|
Earth-to-Orbit Education Pro
…
| Name of Image |
Earth-to-Orbit Education Program "Makes Science Cool |
| Date of Image |
2002-05-17 |
| Full Description |
In this photograph, Jeff Alden (left) and Justin O'Cornor, two middle school students at Lane Middle School in Portland, Oregon are demonstrating their Earth-to-Orbit (ETO) Design Challenge project at NASA Marshall Space Flight Center (MSFC) in Huntsville, Alabama. Jeff and Justin, who are just a couple of "typical teens," have been spending their time tackling some of the same challenges NASA engineers face when designing propulsion systems at MSFC. The ETO Design Challenge is a hands-on educational program, targeted to middle school students, in which students are assigned a project engaging in related design challenges in their classrooms under the supervision of their teachers. The project is valuable because it can be used by any student and any teacher, even those without technical backgrounds. Students in 12 states: Alabama, Arkansas, California, Colorado, Illinois, Missouri, Montana, New York, Ohio, Tennessee, Virginia, and Washington, are taking part in the MSFC's Earth-to-Orbit program. NASA uses such programs to support educational excellence while participating in educational outreach programs through centers around the country. The Oregon students' teacher, Joanne Fluvog, commented, "the biggest change I've seen is in the students' motivation and their belief in their ability to think." Both Justin and Jeff said being involved in a real engineering project has made them realize that "science is cool. |
|
Cloud Heights of Frances and
…
| Title |
Cloud Heights of Frances and Ivan |
| Description |
NASA's Multi-angle Imaging SpectroRadiometer [ http://www-misr.jpl.nasa.gov ] (MISR) captured these images and cloud-top height retrievals of Hurricane Frances on September 4, 2004, when the eye sat just off the coast of eastern Florida, and Hurricane Ivan on September 5, after the storm had devastated Grenada and was heading toward the central and western Caribbean. Hurricane Frances made landfall in the early hours of September 5, and was downgraded to Tropical Storm status as it swept inland through the Florida panhandle and continued northward. Following on the heels of Frances is Hurricane Ivan, which is on record as the strongest tropical hurricane to form at such a low latitude in the Atlantic, and was the most powerful storm to have hit the Caribbean in nearly a decade. The ability of forecasters to predict the intensity and amount of rainfall associated with hurricanes still requires improvement, especially on the 24- to 48-hour timescale vital for disaster planning. To improve the operational models used to make hurricane forecasts, scientists need to better understand the multi-scale interactions at the cloud, mesoscale and synoptic scales that lead to hurricane intensification and dissipation, as well as the various physical processes that determine hurricane intensity and rainfall distributions. Because these uncertainties with regard to how to represent cloud processes still exist, it is vital that the model findings be evaluated against hurricane observations whenever possible. Two-dimensional maps of cloud height such as those shown here offer an unprecedented opportunity for comparing simulated cloud fields against actual hurricane observations. The lefthand panel in each image pair is a natural-color view from MISR's nadir camera. The righthand panels are cloud-top height retrievals produced by automated computer recognition of the distinctive spatial features between images acquired at different view angles. These results indicate that at the time that these images were acquired, clouds within Frances and Ivan had attained altitudes of 15-16 kilometers (9-10 miles) above sea level, respectively. The height fields pictured here are uncorrected for the effects of cloud motion. Wind-corrected heights (which have higher accuracy but coarser spatial coverage) are within about 1 kilometer of the heights shown here. (Visit the Earth Observatory's Natural Hazards Severe Storms [ http://earthobservatory.nasa.gov/NaturalHazards/natural_hazards_v2.php3?topic=storm ] section to view more recent images of Hurricanes Ivan and Frances.) The MISR observes the daylit Earth continuously and every 9 days views the entire globe between 82° north and 82° south latitude. These data products were generated from a portion of the imagery acquired during Terra [ http://terra.nasa.gov ], orbits 25081 and 25094. The panels cover an area of 380 kilometers x 924 kilometers, and utilize data from within blocks 65 to 87 within World Reference System-2 paths 14 and 222, respectively. MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Office of Earth Science, Washington, DC. The Terra satellite is managed by NASA's Goddard Space Flight Center, Greenbelt, MD. JPL is a division of the California Institute of Technology. NASA image courtesy GSFC/LaRC/JPL, MISR Team. [ http://www-misr.jpl.nasa.gov ] Text acknowledgment: Clare Averill (Raytheon/Jet Propulsion Laboratory) and Greg McFarquhar (University of Illinois at Urbana-Champaign). |
|
Hurricane Katrina
| Title |
Hurricane Katrina |
| Description |
Goddard Space Flight Center, Greenbelt, MD. JPL is managed for NASA by the California Institute of Technology. Images and movie courtesy of NASA/GSFC/LaRC/JPL, MISR Team. Caption details provided by Clare Averill (Raytheon ITSS/Jet Propulsion Laboratory), David J. Diner, Mike Garay and Ralph Kahn (Jet Propulsion Laboratory) and Greg McFarquhar (University of Illinois at Urbana-Champaign)., MISR stereo-height estimates (not shown here) indicate that the highest clouds reach 18-19 kilometers above the surface of the Earth. The stereo anaglyph shows relative height variations and enhances the appearance of thin clouds, such as those that mark the series of gravity waves north-east of the eyewall. Atmospheric gravity waves are caused by air displacements in an otherwise stable air layer. In this case, the gravity waves are above the hurricane arms in the upper troposphere, and were probably generated as the towering storm updraft tried to push into the stable air between the troposphere and the stratosphere (known as the tropopause). Some of Katrina's cloud tops were about 2 kilometers above the tropopause. Such high "overshooting tops" are also characteristic of strong and rapidly growing storms. The animation progresses from MISR's most forward-pointing camera, which views the scene first, to the most backward-pointing camera, which views the scene last. It was created by aligning the views from all 9 cameras using the high clouds within the eyewall as a reference point. North is at the top. The convective cloud towers, especially those along the eastern sides of the inner and outer eyewalls, attain the highest altitudes and indicate that the storm is strengthening. Those areas that do not exhibit cloud-top convection are clouds experiencing vertical wind shear, and tend to be lower than the towering cloud structures. The vertical and horizontal development of the convective clouds and the formation of an outer ring of growing clouds (referred to as an "eyewall replacement cycle") also indicate rapid strengthening. During this stage of hurricane development, an outer band of clouds may gradually move inward to replace the existing hurricane eyewall, causing the central pressure to increase and weaken the storm in the short term. However, eyewall replacement may sometimes be a forerunner for rapid strengthening in the longer term. This was the case with Hurricane Katrina, whose central pressure increased slightly on Saturday, but then dropped again significantly on Sunday when Katrina became a Category 5 storm. Observing the development of a concentric eyewall at this spatial and temporal resolution is a unique feature of these MISR observations. The Multi-angle Imaging SpectroRadiometer observes the daylit Earth continuously, viewing the entire globe between 82 degrees North and 82 degrees South latitude every nine days. The still images each cover an area of about 827 kilometers by 380 kilometers, and the animation covers an area of about 202 kilometers by 214 kilometers. The data products were generated from a portion of the imagery acquired during Terra orbit 30280 and utilize data from blocks 69 to 74 within World Reference System-2 path 17. MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Science Mission Directorate, Washington, DC. The Terra satellite is managed by NASA's, This image and animation from NASA's Multi-angle Imaging SpectroRadiometer (MISR) show the strong convective development of Hurricane Katrina on Saturday, August 27, as it moved west through the Gulf of Mexico. Over 7 minutes during which all 9 MISR cameras viewed Katrina, the animation captures the cloud-top sides, the counterclockwise rotation of the eyewall, and the bubbling growth of the towering cloud structures. At this time, Katrina was undergoing rapid development it had just been upgraded to a Category 3 hurricane, and within 24 hours it would reach Category 5. On Monday morning when the eyewall made landfall over the United States, it was a Category 4 storm. Hurricane Katrina was one of the most powerful and destructive storms on record for the Atlantic Basin. The image above is a false-color view (near-infrared, red, and blue wavelengths of reflected light displayed as red, green and blue) from MISR's nadir (pointing straight down) camera. In the image above, north is up. The high resolution image linked above shows a wider view of this false-color image, with north to the left. The vegetated Alabama coast in the upper left-hand corner in this high-resolution image appears in red hues. The bottom panel in the high-resolution image is a 3-D stereo anaglyph created with red band data from MISR's 70-degree-forward-viewing and 60-degree-forward-viewing cameras, displayed as red and green/blue, respectively. To observe the height variations in 3-D, you will need to use red/blue glasses. [ http://photojournal.jpl.nasa.gov/Help/VendorList.html#Glasses ] |
|
Hurricane Katrina
| Title |
Hurricane Katrina |
| Description |
Goddard Space Flight Center, Greenbelt, MD. JPL is managed for NASA by the California Institute of Technology. Images and movie courtesy of NASA/GSFC/LaRC/JPL, MISR Team. Caption details provided by Clare Averill (Raytheon ITSS/Jet Propulsion Laboratory), David J. Diner, Mike Garay and Ralph Kahn (Jet Propulsion Laboratory) and Greg McFarquhar (University of Illinois at Urbana-Champaign)., MISR stereo-height estimates (not shown here) indicate that the highest clouds reach 18-19 kilometers above the surface of the Earth. The stereo anaglyph shows relative height variations and enhances the appearance of thin clouds, such as those that mark the series of gravity waves north-east of the eyewall. Atmospheric gravity waves are caused by air displacements in an otherwise stable air layer. In this case, the gravity waves are above the hurricane arms in the upper troposphere, and were probably generated as the towering storm updraft tried to push into the stable air between the troposphere and the stratosphere (known as the tropopause). Some of Katrina's cloud tops were about 2 kilometers above the tropopause. Such high "overshooting tops" are also characteristic of strong and rapidly growing storms. The animation progresses from MISR's most forward-pointing camera, which views the scene first, to the most backward-pointing camera, which views the scene last. It was created by aligning the views from all 9 cameras using the high clouds within the eyewall as a reference point. North is at the top. The convective cloud towers, especially those along the eastern sides of the inner and outer eyewalls, attain the highest altitudes and indicate that the storm is strengthening. Those areas that do not exhibit cloud-top convection are clouds experiencing vertical wind shear, and tend to be lower than the towering cloud structures. The vertical and horizontal development of the convective clouds and the formation of an outer ring of growing clouds (referred to as an "eyewall replacement cycle") also indicate rapid strengthening. During this stage of hurricane development, an outer band of clouds may gradually move inward to replace the existing hurricane eyewall, causing the central pressure to increase and weaken the storm in the short term. However, eyewall replacement may sometimes be a forerunner for rapid strengthening in the longer term. This was the case with Hurricane Katrina, whose central pressure increased slightly on Saturday, but then dropped again significantly on Sunday when Katrina became a Category 5 storm. Observing the development of a concentric eyewall at this spatial and temporal resolution is a unique feature of these MISR observations. The Multi-angle Imaging SpectroRadiometer observes the daylit Earth continuously, viewing the entire globe between 82 degrees North and 82 degrees South latitude every nine days. The still images each cover an area of about 827 kilometers by 380 kilometers, and the animation covers an area of about 202 kilometers by 214 kilometers. The data products were generated from a portion of the imagery acquired during Terra orbit 30280 and utilize data from blocks 69 to 74 within World Reference System-2 path 17. MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Science Mission Directorate, Washington, DC. The Terra satellite is managed by NASA's, This image and animation from NASA's Multi-angle Imaging SpectroRadiometer (MISR) show the strong convective development of Hurricane Katrina on Saturday, August 27, as it moved west through the Gulf of Mexico. Over 7 minutes during which all 9 MISR cameras viewed Katrina, the animation captures the cloud-top sides, the counterclockwise rotation of the eyewall, and the bubbling growth of the towering cloud structures. At this time, Katrina was undergoing rapid development it had just been upgraded to a Category 3 hurricane, and within 24 hours it would reach Category 5. On Monday morning when the eyewall made landfall over the United States, it was a Category 4 storm. Hurricane Katrina was one of the most powerful and destructive storms on record for the Atlantic Basin. The image above is a false-color view (near-infrared, red, and blue wavelengths of reflected light displayed as red, green and blue) from MISR's nadir (pointing straight down) camera. In the image above, north is up. The high resolution image linked above shows a wider view of this false-color image, with north to the left. The vegetated Alabama coast in the upper left-hand corner in this high-resolution image appears in red hues. The bottom panel in the high-resolution image is a 3-D stereo anaglyph created with red band data from MISR's 70-degree-forward-viewing and 60-degree-forward-viewing cameras, displayed as red and green/blue, respectively. To observe the height variations in 3-D, you will need to use red/blue glasses. [ http://photojournal.jpl.nasa.gov/Help/VendorList.html#Glasses ] |
|
Hurricane Katrina
| Title |
Hurricane Katrina |
| Description |
Goddard Space Flight Center, Greenbelt, MD. JPL is managed for NASA by the California Institute of Technology. Images and movie courtesy of NASA/GSFC/LaRC/JPL, MISR Team. Caption details provided by Clare Averill (Raytheon ITSS/Jet Propulsion Laboratory), David J. Diner, Mike Garay and Ralph Kahn (Jet Propulsion Laboratory) and Greg McFarquhar (University of Illinois at Urbana-Champaign)., MISR stereo-height estimates (not shown here) indicate that the highest clouds reach 18-19 kilometers above the surface of the Earth. The stereo anaglyph shows relative height variations and enhances the appearance of thin clouds, such as those that mark the series of gravity waves north-east of the eyewall. Atmospheric gravity waves are caused by air displacements in an otherwise stable air layer. In this case, the gravity waves are above the hurricane arms in the upper troposphere, and were probably generated as the towering storm updraft tried to push into the stable air between the troposphere and the stratosphere (known as the tropopause). Some of Katrina's cloud tops were about 2 kilometers above the tropopause. Such high "overshooting tops" are also characteristic of strong and rapidly growing storms. The animation progresses from MISR's most forward-pointing camera, which views the scene first, to the most backward-pointing camera, which views the scene last. It was created by aligning the views from all 9 cameras using the high clouds within the eyewall as a reference point. North is at the top. The convective cloud towers, especially those along the eastern sides of the inner and outer eyewalls, attain the highest altitudes and indicate that the storm is strengthening. Those areas that do not exhibit cloud-top convection are clouds experiencing vertical wind shear, and tend to be lower than the towering cloud structures. The vertical and horizontal development of the convective clouds and the formation of an outer ring of growing clouds (referred to as an "eyewall replacement cycle") also indicate rapid strengthening. During this stage of hurricane development, an outer band of clouds may gradually move inward to replace the existing hurricane eyewall, causing the central pressure to increase and weaken the storm in the short term. However, eyewall replacement may sometimes be a forerunner for rapid strengthening in the longer term. This was the case with Hurricane Katrina, whose central pressure increased slightly on Saturday, but then dropped again significantly on Sunday when Katrina became a Category 5 storm. Observing the development of a concentric eyewall at this spatial and temporal resolution is a unique feature of these MISR observations. The Multi-angle Imaging SpectroRadiometer observes the daylit Earth continuously, viewing the entire globe between 82 degrees North and 82 degrees South latitude every nine days. The still images each cover an area of about 827 kilometers by 380 kilometers, and the animation covers an area of about 202 kilometers by 214 kilometers. The data products were generated from a portion of the imagery acquired during Terra orbit 30280 and utilize data from blocks 69 to 74 within World Reference System-2 path 17. MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Science Mission Directorate, Washington, DC. The Terra satellite is managed by NASA's, This image and animation from NASA's Multi-angle Imaging SpectroRadiometer (MISR) show the strong convective development of Hurricane Katrina on Saturday, August 27, as it moved west through the Gulf of Mexico. Over 7 minutes during which all 9 MISR cameras viewed Katrina, the animation captures the cloud-top sides, the counterclockwise rotation of the eyewall, and the bubbling growth of the towering cloud structures. At this time, Katrina was undergoing rapid development it had just been upgraded to a Category 3 hurricane, and within 24 hours it would reach Category 5. On Monday morning when the eyewall made landfall over the United States, it was a Category 4 storm. Hurricane Katrina was one of the most powerful and destructive storms on record for the Atlantic Basin. The image above is a false-color view (near-infrared, red, and blue wavelengths of reflected light displayed as red, green and blue) from MISR's nadir (pointing straight down) camera. In the image above, north is up. The high resolution image linked above shows a wider view of this false-color image, with north to the left. The vegetated Alabama coast in the upper left-hand corner in this high-resolution image appears in red hues. The bottom panel in the high-resolution image is a 3-D stereo anaglyph created with red band data from MISR's 70-degree-forward-viewing and 60-degree-forward-viewing cameras, displayed as red and green/blue, respectively. To observe the height variations in 3-D, you will need to use red/blue glasses. [ http://photojournal.jpl.nasa.gov/Help/VendorList.html#Glasses ] |
|
Hurricane Wilma
| Title |
Hurricane Wilma |
| Description |
(MISR) acquired this sequence of images and cloud-top height observations for Hurricane Wilma as it progressed across the Caribbean in October 2005. Each pair in the sequence has a photo-like view of the storm on the left and a matching color-coded image of cloud-top height on the right. Cloud-top heights range from 0 (purple) to 18 (red) kilometers altitude. Areas where cloud heights could not be determined are shown in dark gray. The pair on the left shows Wilma on Tuesday, October 18, when Hurricane watches were posted for Cuba and Mexico. The central pair shows the eye of Hurricane Wilma just hours before the storm began to cross the Yucatan Peninsula on Friday, October 21. At that time, Wilma was a powerful Category 4 Hurricane on the Saffir-Simpson scale, and had a minimum recorded central pressure of 930 millibars. Hurricane Wilma surged from tropical storm to Category 5 hurricane status in record time, but the storm slowed and weakened considerably after battering Mexico's Yucatan Peninsula and the Caribbean. The right-hand image pair displays the eastern edges of a weakened Wilma, when Wilma had been reduced to Category 2 status and was just starting to reach southern Florida on the morning of Sunday, October 23. Wilma gathered speed and strengthened on Sunday night, crossing Florida as a Category 3 storm on Monday, October 24. On the 18th, Wilma looked a bit ragged. Its eye is located at the center of the left edge, and its outer bands of clouds appear to be dominated by a rather loose collection of thunderstorms. In the photo-like images, these look like areas of "boiling clouds," and in the cloud-height image, these appear as orange blobs, sometimes topped with pinkish-red. On October 21 (center), when Wilma was a Category 4 storm, cloud-top height on the eastern side of the storm near the eye reached 18 kilometers in altitude, with lower heights on the western side. The image from the 23rd shows the eastern edge of Wilma as it approached Florida (upper right) and Cuba (center right). MISR has nine different cameras that view the Earth from a variety of angles. Shifts in the clouds' apparent position from one camera's perspective to another's allows MISR to measure the height of the cloud-tops. MISR scientists have programmed computers to compare the different views, identify features that appear to shift from view to view, and use that information to calculate cloud height automatically. The height fields pictured have not been corrected for the effects of cloud motion. Wind-corrected heights (which have higher accuracy but sparser spatial coverage) are within about 1 kilometer of the heights shown here. The Multi-angle Imaging SpectroRadiometer observes the daylit Earth continuously, viewing the entire globe between 82° North and 82° South latitude every nine days. Each image covers an area of about 380 kilometers by 1,830 kilometers. The data products were generated from a portion of the imagery acquired during Terra orbits, 31037, 31081 and 31110, and utilize data from within blocks 68-83 within World Reference System-2 paths 13, 16 and 18, respectively. Image courtesy NASA/GSFC/LaRC/JPL, MISR Team. Text by Clare Averill (Raytheon RIS/JPL) and Greg McFarquhar (University of Illinois)., Information on cloud-top heights at different stages in the life cycle of the rapidly intensifying Hurricane Wilma may prove useful for evaluating the ability of numerical weather models to predict the intensity changes of hurricanes. NASA's Multi-angle Imaging SpectroRadiometer [ http://www-misr.jpl.nasa.gov/ ] |
|
Snowstorm in the American Mi
…
| Title |
Snowstorm in the American Midwest |
| Description |
The vernal equinox marks the start of spring in the Northern Hemisphere. But after a record-setting warm winter, the start of spring 2006 came with an ironic twist: a powerful snowstorm that blanketed most of the American Midwest in heavy snow. According to the Associated Press, snow fell as rapidly as two inches an hour in Illinois and Indiana, while in parts of Nebraska, total accumulations were as much as two feet (roughly 60 centimeters) of snow, closing sections of Interstate 80. In Colorado and Kansas, the same snow system also forced closings along Interstate 70 on March 20. The AP was also reporting that at least five deaths had been attributed to the snow in Colorado, Nebraska, and Texas. The Moderate Resolution Imaging Spectroradiometer (MODIS) on the Aqua satellite observed the wake behind the storm at 12:55 p.m. Mountain Time (19:45 UTC) on March 21, 2006. In this false-color image, clouds appear white, snow and ice appear blue, and land colors vary from reddish tans to greens in areas of lesser or greater vegetation. While a thin layer of cloud covers much of the area where the heaviest snow fell the previous day, the long, wide swath of blue, occasionally visible through the thin cloud cover, shows the path of the snowstorm. NASA image created by Jesse Allen, Earth Observatory, using data obtained courtesy of the MODIS Rapid Response team. |
|
Comet Meets Ring Nebula: Par
…
| Title |
Comet Meets Ring Nebula: Part II |
| Explanation |
Moving rapidly through planet Earth's night sky, Fragment C of crumbling [ http://www.spitzer.caltech.edu/Media/releases/ ssc2006-13/index.shtml ] comet 73P/Schwassmann-Wachmann 3 [ http://skyandtelescope.com/observing/objects/comets/ article_1704_1.asp ] passed almost directly in front of M57 [ http://seds.lpl.arizona.edu/messier/m/m057.html ] - the Ring Nebula, and faint spiral galaxy IC 1296 [ http://www.skyhound.com/sh/archive/jul/IC_1296.html ] on May 8. In fact, in this gorgeous view [ http://www.masil-astro-imaging.com/ Latest_Images.html ], the bright head of Fragment C is separated by only about 0.1 degrees from M57, with the tail apparently engulfing nebula and galaxy. Recorded from Elizabeth, Illinois, USA, this picture corresponds to the cosmic scene only 30 minutes after yesterday's picture [ http://antwrp.gsfc.nasa.gov/apod/ap060511.html ] of the approaching alignment. The relative motion of the comet [ http://www.galacticimages.com/astronomical_events.html ] against the background stars and nebulae is easy to see when comparing the two images. This comet's fragments [ http://www.skyhound.com/sh/73P.html ] will be near their closest approach in the coming days, about 10 million kilometers away, and none pose any danger [ http://www.nasa.gov/mission_pages/hubble/ Comet_73P.html ] to our fair planet. |
|
Comet Hyakutake Passes the E
…
| Title |
Comet Hyakutake Passes the Earth |
| Explanation |
This picture [ http://www.astro.uiuc.edu/~pmcc/comet/index.html ] of Comet Hyakutake taken the night of March 21/22 in Illinois, USA shows the enormous tail that has already developed. The silhouette on the right is a foreground tree, and the superposed green circle on the left shows the size of the full moon. Today Comet Hyakutake [ http://www.jpl.nasa.gov/comet/hyakutake/ ] makes its closest approach to the Earth [ http://antwrp.gsfc.nasa.gov/apod/ap950622.html ]. As the comet moves into the inner Solar System [ http://antwrp.gsfc.nasa.gov/apod/ap950819.html ], it will pass the Earth [ http://antwrp.gsfc.nasa.gov/apod/ap950629.html ] at about 40 times the distance of our Moon [ http://antwrp.gsfc.nasa.gov/apod/ap951008.html ]. This is "not" the closest a comet has ever come, though. [ http://cfa-www.harvard.edu/cfa/ps/lists/ClosestComets.html ] As recently as 1983 Comet IRAS-Araki-Alcock [ http://medicine.wustl.edu/~kronkg/iaa.html ] came three times closer than Hyakutake, and in 1770 Comet Lexell got yet twice closer than that! Asteroids [ http://antwrp.gsfc.nasa.gov/apod/ap951020.html ] - usually less massive than comets [ http://antwrp.gsfc.nasa.gov/apod/lib/comets.html ] - frequently whiz by "inside" the Moon [ http://antwrp.gsfc.nasa.gov/apod/ap950903.html ]'s orbit, with four doing so far in this decade [ http://cfa-www.harvard.edu/cfa/ps/lists/Closest.html ]. In the distant past, asteroids [ http://antwrp.gsfc.nasa.gov/apod/ap950630.html ] have even struck the Earth. Comet Hyakutake [ http://www.skypub.com/comets/hyaku2.html ] is much brighter now than Comet IRAS-Araki-Alcock ever got, and in fact is the brightest since Comet West [ http://antwrp.gsfc.nasa.gov/apod/ap950826.html ] in 1976. Comet Hyakutake will be easily visible all week. [ http://antwrp.gsfc.nasa.gov/apod/ap960322.html ] |
|
Structure in N63A
| Title |
Structure in N63A |
| Explanation |
Shells and arcs abound in this false-color, multiwavelength [ http://imagine.gsfc.nasa.gov/docs/science/know_l2/ multiwavelength.html ] view of supernova remnant N63A [ http://chandra.harvard.edu/photo/2003/n63a/ ], the debris of a massive stellar explosion. The x-ray emission [ http://arxiv.org/abs/astro-ph/0209370 ] (blue), is from gas heated to 10 million degrees C as knots of fast moving material from the cosmic blast [ http://chandra.harvard.edu/xray_sources/supernovas.html ] sweep up surrounding interstellar matter. Radio (red) and optical emission (green) are brighter near the central regions where the x-rays seem to be absorbed by denser, cooler material on the side of the expanding debris cloud facing the Earth. Located in the neighboring galaxy known as the Large Magellanic Cloud [ http://imagine.gsfc.nasa.gov/docs/science/know_l2/ multiwavelength.html ], the apparent [ http://chandra.harvard.edu/photo/ cosmic_lookback.html ] age [ http://chandra.harvard.edu/photo/0237/age.html ] of this supernova remnant is between 2,000 and 5,000 years, its extended glow spanning about 60 light-years. The intriguing image is a composite of [ http://chandra.harvard.edu/photo/2003/n63a/ more.html ] x-ray data from the orbiting Chandra Observatory [ http://chandra.harvard.edu/chronicle/index.html ], optical data from the Hubble Space Telescope [ http://hubblesite.org ], and radio from the Australia Telescope Compact Array [ http://www.narrabri.atnf.csiro.au/cgi-bin/Public/ atca_live.cgi ]. |
|
A Chicago Meteorite Fall
| Title |
A Chicago Meteorite Fall |
| Explanation |
If you wait long enough, a piece of outer space itself will come right to you. As Colby Navarro worked innocently on the computer [ http://www.computerhistory.org/timeline/timeline.php?timeline_year=1945 ], a rock from space crashed [ http://www.nbc5.com/news/2068758/detail.html ] through the roof, struck the printer, banged off the wall, and came to rest near the filing cabinet. This occurred around midnight on March 26, 2003 in Park Forest, Illinois [ http://www.state.il.us/ ], USA [ http://www.cia.gov/cia/publications/factbook/geos/us.html ], near Chicago [ http://www.ci.chi.il.us/ ]. The meteorite [ http://seds.lpl.arizona.edu/nineplanets/nineplanets/meteorites.html ], measuring about 10 cm across, was one of several [ http://www.space.com/scienceastronomy/solarsystem/midwest_meteors_030228.html ] that fell near Chicago [ http://skyandtelescope.com/news/current/article_936_1.asp ] that day as part of a tremendous fireball [ http://antwrp.gsfc.nasa.gov/apod/ap011119.html ]. Pictured above is the resulting hole in the ceiling, while the inset image shows the wall dent [ http://antwrp.gsfc.nasa.gov/apod/ap021118.html ] and the meteorite [ http://www.nineplanets.org/meteorites.html ] itself. Although the vast majority of meteors [ http://kids.msfc.nasa.gov/SolarSystem/Meteors/Meteors.asp ] is much smaller and burn up in the Earth's atmosphere [ http://csep10.phys.utk.edu/astr161/lect/earth/atmosphere.html ], the average homeowner should expect to repair direct meteor [ http://antwrp.gsfc.nasa.gov/apod/ap020623.html ] damage every hundred million years. |
|
Spring Flooding on the Missi
…
| Title |
Spring Flooding on the Mississippi |
| Description |
The mighty Mississippi River, from its source at Lake Itasca, Minnesota to the Gulf of Mexico, is approximately 3780 kilometers long and has flooded many times during its history. In April 2001, residents of Minnesota, Wisconsin, Iowa, and Illinois once again battled near-record water levels. These Multi-angle Imaging SpectroRadiometer (MISR) images, acquired one month apart, illustrate the effects of snowmelt and heavy rainfall on areas traversed by the upper Mississippi River. Each image in this pair covers an identical 195-kilometer x 339-kilometer area. The one on the left was acquired March 26, 2001 (Terra orbit 6762), and the one on the right is from April 27 (Terra orbit 7228). Both are false-color composites, displaying data from the near-infrared band of the instrument's nadir (vertical-viewing) camera as red, the green band of the nadir camera as green, and the red band of the 26-degree forward camera as blue. Data from the forward-viewing camera is included to enhance the reflectivity of water. The near-infrared data provide a good indicator of the abundance of vegetation since plants are highly reflective in this spectral region. The redder color of the right-hand image is due to increased vegetation cover brought about by wet conditions and the onset of spring. Locations of major cities are marked on the left-hand image, major rivers are marked on the right. The portion of the Mississippi River captured in these views extends from just north of La Crosse, Wisconsin to south of Davenport, Iowa. The Wisconsin River joins the Mississippi just below Prairie du Chien. On March 26, snow can clearly be seen over much of the northern portions of the left-hand image. At this point in time, the snow had already begun to melt and the Wapsipinicon River was 52 centimeters above flood stage at De Witt, Iowa (between Clinton and Davenport). By mid-April heavy rainfall swelled the Mississippi and Wisconsin rivers. In the early morning of April 25, two days before the right-hand image was acquired, the Mississippi River crested in Davenport, Iowa at 680 centimeters, slightly below the level reached in the record-setting flood of 1993. MISR was built and is managed by NASA's Jet Propulsion Laboratory, Pasadena, CA, for NASA's Office of Earth Science, Washington, DC. The Terra satellite is managed by NASA's Goddard Space Flight Center, Greenbelt, MD. JPL is a division of the California Institute of Technology. |
| Date |
07.11.2001 |
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STS-36 Shuttle in Mate-Demat
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| Title |
STS-36 Shuttle in Mate-Demate Device (MDD) Close-up |
| Description |
A close-up, front view of the Space Shuttle Atlantis in the Mate-Demate Device (MDD) as technicians work to prepare the orbiter for its ferry flight from NASA's Ames-Dryden Flight Research Facility (later, the Dryden Flight Research Center) to the Kennedy Space Center, Florida. The 100-foot-high, steel-truss, cantilevered facility is capable of precision positioning more than 220,000 pounds and is used to raise the orbiters onto jacks for ferry-flight servicing, and then hoist them higher to mate them atop the NASA 747 Shuttle Carrier Aircraft (SCA). The MDD, which features three separate hoist units, each capable of lifting 100,000 pounds, was designed by Connell Associates, Inc., Coral Gables, Florida, and built be the George A. Fuller Co., Chicago, Illinois, at a cost of $1.7 million. Space Shuttles are the main element of America's Space Transportation System and are used for space research and other space applications. The shuttles are the first vehicles capable of being launched into space and returning to Earth on a routine basis. Space Shuttles are used as orbiting laboratories in which scientists and mission specialists conduct a wide variety of scientific experiments. Crews aboard shuttles place satellites in orbit, rendezvous with satellites to carry out repair missions and return them to space, and retrieve satellites and return them to Earth for refurbishment and reuse. Space Shuttles are true aerospace vehicles. They leave Earth and its atmosphere under rocket power provided by three liquid-propellant main engines with two solid-propellant boosters attached plus an external liquid-fuel tank. After their orbital missions, they streak back through the atmosphere and land like airplanes. The returning shuttles, however, land like gliders, without power and on runways. Other rockets can place heavy payloads into orbit, but, they can only be used once. Space Shuttles are designed to be continually reused. When Space Shuttles are used to transport complete scientific laboratories into space, the laboratories remain inside the payload bay throughout the mission. They are then removed after the Space Shuttle returns to Earth and can be reused on future flights. Some of these orbital laboratories, like the Spacelab, provide facilities for several specialists to conduct experiments in such fields as medicine, astronomy, and materials manufacturing. Some types of satellites deployed by Space Shuttles include those involved in environmental and resources protection, astronomy, weather forecasting, navigation, oceanographic studies, and other scientific fields. The Space Shuttles can also launch spacecraft into orbits higher than the Shuttle's altitude limit through the use of Inertial Upper Stage (IUS) propulsion units. After release from the Space Shuttle payload bay, the IUS is ignited to carry the spacecraft into deep space. The Space Shuttles are also being used to carry elements of the International Space Station into space where they are, assembled in orbit. The Space Shuttles were built by Rockwell International's Space Transportation Systems Division, Downey, California. Rockwell's Rocketdyne Division (now part of Boeing) builds the three main engines, and Thiokol, Brigham City, Utah, makes the solid rocket booster motors. Martin Marietta Corporation (now Lockheed Martin), New Orleans, Louisiana, makes the external tanks. Each orbiter (Space Shuttle) is 121 feet long, has a wingspan of 78 feet, and a height of 57 feet. The Space Shuttle is approximately the size of a DC-9 commercial airliner and can carry a payload of 65,000 pounds into orbit. The payload bay is 60 feet long and 15 feet in diameter. Each main engine is capable of producing a sea level thrust of 375,000 pounds and a vacuum (orbital) thrust of 470,000 pounds. The engines burn a mixture of liquid oxygen and liquid hydrogen. In orbit, the Space Shuttles circle the earth at a speed of 17,500 miles per hour with each orbit taking about 90 minutes. A Space Shuttle crew sees a sunrise or sunset every 45 minutes. When Space Shuttle flights began in April 1981, Dryden Flight Research Center, Edwards, California, was the primary landing site for the Shuttles. Now Kennedy Space Center, Florida, is the primary landing site with Dryden remaining as the principal alternate landing site. |
| Date |
03.01.1990 |
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