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Bright Star Birth Region in …
Title Bright Star Birth Region in a Dim Galaxy
Hubble Space Telescope Finds …
Title Hubble Space Telescope Finds Stellar Graveyard
Hubble Pinpoints Distant Sup …
Title Hubble Pinpoints Distant Supernovae
General Information What is an American Astronomical Society Meeting release? A major news announcement issued at an American Astronomical Society meeting, the premier astronomy conference. Peering halfway across the universe to analyze light from exploded stars that died long before our Sun even existed, the Hubble telescope has allowed astronomers to determine that the expansion of the cosmos has not slowed since the initial impetus of the Big Bang. Thus, the universe's expansion should continue to balloon outward indefinitely. These results are based on unprecedented distance measurements to supernovae that are so far away they allow astronomers to determine if the universe was expanding at a faster rate long ago. These images showcase three of the supernovae used in the survey. The arrows in the bottom row of pictures pinpoint these exploding stars, the top row of images shows the regions where the supernovae reside. Read more: * Release Text [ http://hubblesite.org/newscenter/archive/releases/1998/02/text/ ]
Hubble Zooms In on Heart of …
Title Hubble Zooms In on Heart of Mystery Comet
Hubble Zooms In on Heart of …
Title Hubble Zooms In on Heart of Mystery Comet
Hubble Zooms In on Heart of …
Title Hubble Zooms In on Heart of Mystery Comet
Hubble Zooms In on Heart of …
Title Hubble Zooms In on Heart of Mystery Comet
Mars: Closest Approach 2007
Title Mars: Closest Approach 2007
General Information What is Hubble Heritage? A monthly showcase of new and archival Hubble images. Go to the Heritage site. NASA's Hubble Space Telescope took this close-up of the red planet Mars when it was just 55 million miles ? 88 million kilometers ? away. This color image was assembled from a series of exposures taken within 36 hours of the Mars closest approach with Hubble's Wide Field and Planetary Camera 2. Mars will be closest to Earth on December 18, at 11:45 p.m. Universal Time (6:45 p.m. EST).
Hubble Finds Mysterious Disk …
Title Hubble Finds Mysterious Disk of Blue Stars Around Black Hole
First ESA Faint Object Camer …
Title First ESA Faint Object Camera Science Images Pluto - the "Double Planet
Hubble Sees Faintest Stars i …
Title Hubble Sees Faintest Stars in a Globular Cluster
Hubble Zooms In on Heart of …
Title Hubble Zooms In on Heart of Mystery Comet
Ionosphere Total Electron Co …
Title Ionosphere Total Electron Content - April 2001
Abstract A view of the ionospheric Total Electron Content (TEC) measured over North America during a storm in April 2001. Red is high electron counts, blue is low, grey where there is no data. From the pre-storm state, we see relatively low electron counts . As the storm intensity increases, so do the number of electrons. The increase will generate more interference for communications systems, GPS, etc.
Completed 2005-11-18
Ionosphere Total Electron Co …
Title Ionosphere Total Electron Content - November 2003
Abstract This movie displays plume formation for a space weather event in November 2003. In this visualization, the observer is fixed between the Sun and the Earth (slightly off the center line for better perspective). Blue represents low ionospheric electron counts, dark red is high electron counts.
Completed 2005-11-18
Ionosphere Total Electron Co …
Title Ionosphere Total Electron Content - November 2003
Abstract This movie displays plume formation for a space weather event in November 2003. In this visualization, the observer is fixed between the Sun and the Earth (slightly off the center line for better perspective). Blue represents low ionospheric electron counts, dark red is high electron counts.
Completed 2005-11-18
STS-88 Mission Insignia
Name of Image STS-88 Mission Insignia
Date of Image 1998-11-08
Full Description Designed by the STS-88 crew members, this patch commemorates the first assembly flight to carry United States-built hardware for constructing the International Space Station (ISS). This flight's primary task was to assemble the cornerstone of the Space Station: the Node with the Functional Cargo Block (FGB). The rising sun symbolizes the dawning of a new era of international cooperation in space and the beginning of a new program: the International Space Station. The Earth scene outlines the countries of the Station Partners: the United States, Russia, those of the European Space Agency (ESA), Japan, and Canada. Along with the Pressurized Mating Adapters (PMA) and the Functional Cargo Block, the Node is shown in the final mated configuration while berthed to the Space Shuttle during the STS-88/2A mission. The Big Dipper Constellation points the way to the North Star, a guiding light for pioneers and explorers for generations. In the words of the crew, These stars symbolize the efforts of everyone, including all the countries involved in the design and construction of the International Space Station, guiding us into the future.
Heat Wave in North America
Title Heat Wave in North America
Description Scorching summer sun, burning pavement, stinging sweat—normal for July. But in July 2006, temperatures climbed above average levels for the previous six years and stayed warm for several days. During mid-July, a heat wave settled over most of the United States, with air temperatures soaring past 100 degrees Fahrenheit (38 Celsius). Land surface temperatures climbed as well, as this image shows. Most of the United States and portions of Canada and Mexico were much warmer than they had been during the same period from 2000 to 2005. Deep red across the Midwest indicates that land surface temperatures were as much as 10 degrees Celsius warmer than the six-year average, and with the exception of the Pacific Northwest and a few other isolated region, the rest of the country was also warmer than average. The heat wave continued past the period shown here, through the end of July. In California alone, the heat killed at least 126 people, reported Reuters on July 29. This image was created from data collected by the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Terra [ http://terra.nasa.gov/ ] satellite between July 12 and July 19, 2006. NASA image created by Jesse Allen, Earth Observatory, using data provided courtesy of Zhengming Wan, MODIS Land Surface Temperature Group, Institute for Computational Earth System Science [ http://www.icess.ucsb.edu/ ], University of California, Santa Barbara.
Lake Effect Snow in the Unit …
Title Lake Effect Snow in the United States
Description Like light radiating from the Sun, streamers of snow streak southeast from the Great Lakes in this photo-like image, collected by the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Terra [ http://terra.nasa.gov/ ] satellite on December 9, 2006. The snow seen here came from two different storms. The broad swath of white extending from the left edge of the image to Lake Michigan was deposited on December 1 by a powerful winter storm [ http://earthobservatory.nasa.gov/Newsroom/NewImages/images.php3?img_id=17480 ] that left thousands without power for many days. The snow on the southeastern side of the Great Lakes, however, fell on December 7 and December 8 as lake-effect snow. Lake-effect snow occurs along the southeastern edge of the Great Lakes when icy wind blows across the lakes from Canada. The wind picks up relatively warm, moist air over the lakes and pushes it over land, where the air is cooler. When the moist air encounters cooler temperatures over land, the water condenses into precipitation, which in this case fell as snow. The signature of lake-effect snow is striking in this image. A field of white lines the southeastern shores of each of the Great Lakes. The strong winds that generated the snow left their imprint in the form of long streamers of snow that extend all the way to the deep brown folds of the Appalachian Mountains along the right edge of the image.Daily images [ http://rapidfire.sci.gsfc.nasa.gov/subsets/ ] of the United States can be viewed on the MODIS Rapid Response web site. The tiny red dots in this image indicate where MODIS detected fires. NASA image courtesy the MODIS Rapid Response Team [ http://rapidfire.sci.gsfc.nasa.gov ] at NASA GSFC.
Massive Flare Erupts on Sun
Title Massive Flare Erupts on Sun
Description A massive solar flare erupted from the surface of the Sun at 9:51 UTC on October 28, 2003. The solar flare persisted for more than an hour, peaking at 11:10 UTC. Associated with the flare was an ejection of a billion tons or more of gas from the Sun?s tenuous outer atmosphere, or corona. Both the flare and the coronal mass ejection accelerated electrically charged particles to very high energies and hurled them at near the speed of light directly toward the Earth. It takes light roughly 8 minutes to travel from the Sun to Earth, and these particles made the trip in less than an hour. NOAA is predicting that the coronal mass ejection will hit the Earth?s magnetosphere sometime early tomorrow (Oct. 29), probably at or before 12 noon UTC. (Click to visit the NOAA Space Environment Center?s Space Weather [ http://sec.noaa.gov/today2.html ], Web site for more details.) The images above show the event from the perspective of three different satellite sensors. The top image was acquired by the Large Angle and Spectrometric Coronagraph (LASCO), aboard NASA?s Solar and Heliospheric Observatory (SOHO) satellite. In the center of the image is an occultation disc, which allows the sensor to focus on the scattering of light from the Sun?s surface off the free electrons in the Sun?s corona. This light appears as the orange halo seemingly radiating outward from the Sun. (The white circle on the occultation disc shows the actual size and location of the solar disc). Note the bright white features extending from beneath and to the left of the Sun. These are today?s coronal mass ejections, which appear to be heading directly toward the Earth. The bottom left image shows the Michelson Doppler Imager (MDI) view of the Sun?s visible surface. The dark patches are sunspots, which are a tepid 4,000 Kelvin?much cooler than the Sun?s typical surface temperature of 6,000 Kelvin. The bottom right scene shows the view from the Extreme Ultraviolet Imaging Telescope (EIT). This sensor shows the light from a single ionized species of iron that is formed at about 1.5 million Kelvin high in the Sun?s corona. Today?s solar flare appears as the bright green-white feature toward the bottom left of the solar disc. To put this event in perspective, NOAA predicts the impacts of the coronal mass ejection on the Earth?s magnetosphere will be a ?4? (severe) on a scale of 1 to 5. The flare is the third largest ever recorded in the 30 years since NOAA began observing soft X-ray emissions from the Sun. Today?s flare is listed as an X17.2, with an X20 being the most intense flare ever observed in that time. People living in Quebec, Canada, may recall that in March 1989 an X15 solar storm was strong enough to knock out the region?s power grid. Officials say it is possible that people in the Southern Hemisphere will see aurorae at much lower latitudes than usual on Oct. 29, when the coronal mass ejection reaches Earth. It is also possible that people could experience problems using telecommunications devices, such as satellite phones and pagers. In May 1998, for example, the commercial Galaxy IV satellite was damaged by a solar storm, knocking out its ability to support telecommunications. For more images from the SOHO mission, please see http://sohowww.nascom.nasa.gov/hotshots/2003_10_28/ [ http://sohowww.nascom.nasa.gov/hotshots/2003_10_28/ ]. To learn more about NASA?s ongoing studies of the Sun-Earth connection, please read A Violent Sun Affects the Earth?s Ozone [ http://earthobservatory.nasa.gov/Study/ProtonOzone/ ]. Images courtesy Solar & Heliospheric Observatory [ http://sohowww.nascom.nasa.gov/ ]
Massive Solar Flare
Title Massive Solar Flare
Description A massive solar flare erupted from the surface of the Sun at 9:51 UTC on October 28, 2003. The solar flare persisted for more than an hour, peaking at 11:10 UTC. Associated with the flare was an ejection of a billion tons or more of gas from the Sun's tenuous outer atmosphere, or corona. Both the flare and the coronal mass ejection accelerated electrically charged particles to very high energies and hurled them at near the speed of light directly toward the Earth. It takes light roughly 8 minutes to travel from the Sun to Earth, and these particles made the trip in less than an hour. NOAA is predicting that the coronal mass ejection will hit the Earth's magnetosphere sometime early tomorrow (Oct. 29), probably at or before 12 noon UTC. (Click to visit the NOAA Space Environment Center's Space Weather [ http://sec.noaa.gov/today2.html ], Web site for more details.) The images above show the event from the perspective of three different satellite sensors. The top image was acquired by the Large Angle and Spectrometric Coronagraph (LASCO), aboard NASA's Solar and Heliospheric Observatory (SOHO) satellite. In the center of the image is an occultation disc, which allows the sensor to focus on the scattering of light from the Sun's surface off the free electrons in the Sun's corona. This light appears as the orange halo seemingly radiating outward from the Sun. (The white circle on the occultation disc shows the actual size and location of the solar disc). Note the bright white features extending from beneath and to the left of the Sun. These are today's coronal mass ejections, which appear to be heading directly toward the Earth. The bottom left image shows the Michelson Doppler Imager (MDI) view of the Sun's visible surface. The dark patches are sunspots, which are a tepid 4,000 Kelvin—much cooler than the Sun's typical surface temperature of 6,000 Kelvin. The bottom right scene shows the view from the Extreme Ultraviolet Imaging Telescope (EIT). This sensor shows the light from a single ionized species of iron that is formed at about 1.5 million Kelvin high in the Sun's corona. Today's solar flare appears as the bright green-white feature toward the bottom left of the solar disc. To put this event in perspective, NOAA predicts the impacts of the coronal mass ejection on the Earth's magnetosphere will be a "4" (severe) on a scale of 1 to 5. The flare is the third largest ever recorded in the 30 years since NOAA began observing soft X-ray emissions from the Sun. Today's flare is listed as an X17.2, with an X20 being the most intense flare ever observed in that time. People living in Quebec, Canada, may recall that in March 1989 an X15 solar storm was strong enough to knock out the region's power grid. Officials say it is possible that people in the Southern Hemisphere will see aurorae at much lower latitudes than usual on Oct. 29, when the coronal mass ejection reaches Earth. It is also possible that people could experience problems using telecommunications devices, such as satellite phones and pagers. In May 1998, for example, the commercial Galaxy IV satellite was damaged by a solar storm, knocking out its ability to support telecommunications. For more images from the SOHO mission, please see http://sohowww.nascom.nasa.gov/hotshots/2003_10_28/ [ http://sohowww.nascom.nasa.gov/hotshots/2003_10_28/ ]. To learn more about NASA's ongoing studies of the Sun-Earth connection, please read A Violent Sun Affects the Earth's Ozone [ http://earthobservatory.nasa.gov/Study/ProtonOzone/ ]. Images courtesy Solar & Heliospheric Observatory [ http://sohowww.nascom.nasa.gov/ ]
Monterrey, Mexico
Title Monterrey, Mexico
Description In northeastern Mexico's Nuevo Leon state, the Sierra Madre Oriental (Eastern Sierra Madres) cluster in densely packed rows of arcing ridgelines. Just to the southwest of the city of Monterrey, these west-to-east running ridges make a sharp bend toward the south. The mountains then continue southward roughly parallel to the Gulf Coast for hundreds of miles. This image of the region around Monterrey was captured by the Enhanced Thematic Mapper Plus sensor on NASA's Landsat satellite on November 28, 1999. The dry terrain at lower elevations in the image appear in shades of tan and brown, while on the sharp ridges, vegetation appears dull to deep green. The urban development of Monterrey makes a gray patch at the foothills of the mountains. A river winds its way through the ridges as a tan ribbon. This location is a key turning point in the migration route of the monarch butterfly, which returns from latitudes as far north as Canada to overwinter on mountain peaks several hundred miles southwest of Monterrey. The flight path of butterflies follows the ridgelines. The butterflies fly due east for a time, but when the ridges curve south-southeast, so do the insects. Scientists are still trying to understand what role various cues such as the angle of the Sun in the sky, the Earth's magnetic field, and physical or meteorological landmarks (such as dominant wind patterns) play in guiding the monarchs on their migrations. To read more about monarch butterfly migration, please visit the Journey North Website. [ http://www.learner.org/jnorth/tm/monarch/MapGoogleMexicoRoute.html ] NASA image created by Jesse Allen, Earth Observatory, using data obtained from the University of Maryland's Global Land Cover Facility. [ http://www.landcover.org/ ]
The Helix Nebula from CFHT
Title The Helix Nebula from CFHT
Explanation One day our Sun may look like this. The Helix Nebula [ http://antwrp.gsfc.nasa.gov/apod/ap960417.html ] is the closest example of a planetary nebula [ http://antwrp.gsfc.nasa.gov/apod/planetary_nebulae.html ] created at the end of the life of a Sun-like star. The outer gasses of the star expelled into space [ http://www.seds.org/messier/planetar.html ] appear from our vantage point as if we are looking down a helix [ http://mathworld.wolfram.com/Helix.html ]. The remnant central stellar core, destined to become a white dwarf star [ http://imagine.gsfc.nasa.gov/docs/science/know_l2/dwarfs.html ], glows in light so energetic [ http://snoopy.gsfc.nasa.gov/~orfeus2/ultraviolet.html ] it causes the previously expelled gas to fluoresce [ http://www.exploratorium.edu/xref/exhibits/fluorescent_tube.html ]. The Helix Nebula [ http://www-personal.umich.edu/~jstys/nebulae/ngc7293.html ], given a technical designation of NGC 7293 [ http://www.seds.org/messier/xtra/ngc/n7293.html ], lies 450 light-years [ http://chandra.harvard.edu/photo/cosmic_distance.html ] away towards the constellation [ http://www.emufarm.org/~cmbell/myth/myth.html ] of Aquarius [ http://www.astronomical.org/constellations/aqr.html ] and spans 1.5 light-years. The above image was taken with the Canada-France-Hawaii Telescope [ http://www.cfht.hawaii.edu/ ] (CFHT) located atop a dormant volcano in Hawaii [ http://www.state.hi.us/ ], USA. A close-up of the inner edge [ http://antwrp.gsfc.nasa.gov/apod/ap970720.html ] of the Helix Nebula [ http://antwrp.gsfc.nasa.gov/apod/ap970901.html ] shows unusual gas knots of unknown origin [ http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1998ApJ...503..792B ].
Mount Megantic Magnetic Stor …
Title Mount Megantic Magnetic Storm
Explanation Plasma from the Sun and debris from a comet both collided with planet Earth last Saturday morning triggering magnetic storms [ http://www.sec.noaa.gov/NOAAscales/ ] and a meteor shower in a dazzling atmospheric spectacle [ http://spacescience.com/headlines/y2000/ ast14aug_1.htm ]. The debris stream from comet Swift-Tuttle is anticipated [ http://antwrp.gsfc.nasa.gov/apod/ap000812.html ] yearly, and many skygazers [ http://www.imo.net/news/news.html ] already planned to watch the peak of the annual Perseids [ http://comets.amsmeteors.org/meteors/showers/ perseids.html ] meteor shower in the dark hours of August 11/12. But the simultaneous, widely reported [ http://www.globaldialog.com/~jrummel/Aurora/ Aurora.html ] auroras were [ http://www.infowest.com/personal/s/schmutz/ aurora.HTML ] triggered by the chance arrival of something much less predictable -- a solar coronal mass ejection [ http://science.nasa.gov/ssl/pad/solar/ cmes.htm ]. This massive bubble of energetic plasma was seen leaving the active Sun's surface on August 9, just in time to travel to Earth and disrupt the planet's magnetic field [ http://www-spof.gsfc.nasa.gov/Education/ Intro.html ] triggering extensive auroras [ http://antwrp.gsfc.nasa.gov/cgi-bin/apod/ apod_ts?aurora ] during the meteor shower's peak! Inspired by the cosmic light show, Sebastien Gauthier photographed the [ http://www.geocities.com/CapeCanaveral/Station/3622/ AlbumPhotoAstronomie/AlbumAstronomie3.htm ] colorful auroral displays above the dramatic dome of the Mount-Megantic [ http://astrolab.interlinx.qc.ca/ ] Popular Observatory [ http://astrolab.interlinx.qc.ca/Obs_pop/ OPMM/ob_pop_choix.htm ] in southern Quebec, Canada. Bright Jupiter and giant star Aldebaran can be seen peering through [ http://antwrp.gsfc.nasa.gov/apod/ap000504.html ] the shimmering northern lights at the upper right.
Solstice And Season's Eclips …
Title Solstice And Season's Eclipse
Explanation Today the Sun reaches its southernmost point [ http://www-spof.gsfc.nasa.gov/stargaze/Sseason.htm ] in planet Earth's sky at 13:37 UT [ http://aa.usno.navy.mil/AA/faq/docs/UT.html ]. This celestial event is known as a solstice, marking the beginning of Summer [ http://antwrp.gsfc.nasa.gov/apod/ap951222.html ] in the Southern Hemisphere and Winter in the North. But this year, the solstice will be followed, on December 25th, by another geocentric celestial event [ http://aa.usno.navy.mil/AA/data/docs/EarthSeasons.html ] -- the last eclipse of the millennium [ http://www.usno.navy.mil/millennium/ ]! The Christmas day eclipse [ http://sunearth.gsfc.nasa.gov/eclipse/extra/ PSE2000Dec25.html ] will only be a partial one as the silhouetted disk of the Moon obscures the Sun's edge. Visible [ http://sunearth.gsfc.nasa.gov/eclipse/SEplot/ SE2000Dec25P.gif ] from much of Canada [ http://sunearth.gsfc.nasa.gov/eclipse/extra/ PSE2000Dec25city2/PSE2000Dec25city2.html ], The United States [ http://sunearth.gsfc.nasa.gov/eclipse/extra/ PSE2000Dec25city1/PSE2000Dec25city1.html ] and Mexico [ http://sunearth.gsfc.nasa.gov/eclipse/extra/ PSE2000Dec25city3/PSE2000Dec25city3.html ], the appearance of the partially eclipsed Sun might remind you of the last holiday cookie [ http://www.cs.cmu.edu/~mjw/recipes/cookies/cookie.html ] you took a bite from. Still, the exact timing and degree of the eclipse will depend very much on your location. This image, from an annular eclipse [ http://www.astrosurf.com/alphaweb/10mai94/ ] in 1994, shows the lunar disk covering around 55% of the Sun's diameter. It is representative of what could be seen from Washington D. C. during the December 25 eclipse maximum which, for that location, occurs at 12:41 PM ET. As always, if you view the eclipse be extremely careful [ http://www.mreclipse.com/Totality/ TotalityCh11.html#Intro ] to protect your eyes.
Sudbury Indicates Nonstandar …
Title Sudbury Indicates Nonstandard Particle Model
Explanation The Sudbury Neutrino Observatory [ http://www.sno.phy.queensu.ca/ ] (SNO) has been detecting so few neutrinos [ http://www-e815.fnal.gov/~bugel/why.html ] from the Sun [ http://www.nineplanets.org/sol.html ] that the Standard Model [ http://www2.slac.stanford.edu/vvc/theory/model.html ] of fundamental particles [ http://www2.slac.stanford.edu/vvc/theory/fundamental.html ] in the universe may have to be revised. Pictured above [ http://www.sno.phy.queensu.ca/sno/images/publicity_photos/index.html ] is the SNO as it was being built. Now operating, this large sphere beneath Canada [ http://www.cia.gov/cia/publications/factbook/geos/ca.html ] is detecting nearly invisible particles called neutrinos [ http://wwwlapp.in2p3.fr/neutrinos/aneut.html ] being emitted from the center of the Sun [ http://antwrp.gsfc.nasa.gov/apod/ap980605.html ]. SNO [ http://antwrp.gsfc.nasa.gov/apod/ap010225.html ] appears to be measuring a rate expected for all types of neutrinos [ http://www.ps.uci.edu/~superk/neutrino.html ] combined but a decided deficit for the electron neutrino [ http://www.treasure-troves.com/physics/ElectronNeutrino.html ]. The results [ http://www.sno.phy.queensu.ca/sno/first_results/ ] are being interpreted as bolstering previous evidence [ http://antwrp.gsfc.nasa.gov/apod/ap010517.html ] that different types of neutrinos are changing into each other. The most popular model for fundamental particles [ http://www.cpepweb.org/cpep_sm_large.html ], known as the Standard Model [ http://www.lns.cornell.edu/public/lab-info/quark.html ], did not predict such schizophrenic neutrinos [ http://www.sno.phy.queensu.ca/sno/first_results/sno_first_results2.ps ]. Implications include [ http://xxx.lanl.gov/abs/hep-ph/0106258 ] that neutrinos have mass [ http://cupp.oulu.fi/neutrino/nd-mass.html ] and therefore comprise some of the dark matter [ http://www.sciam.com/specialissues/0398cosmos/0398rubin.html ] in the universe, although probably not a cosmologically significant amount.
A Yukon Aurora
Title A Yukon Aurora
Explanation Last week was another good week for auroras [ http://www.pfrr.alaska.edu/~ddr/ASGP/STRSCOOP/AURORA/SUMMARY.HTM ]. The story began about two weeks ago when two large Coronal Mass Ejections [ http://antwrp.gsfc.nasa.gov/apod/ap000309.html ] exploded off the Sun [ http://www.nineplanets.org/sol.html ]. Waves of elementary particles [ http://sol.sci.uop.edu/~jfalward/elementaryparticles/elementaryparticles.html ] and ions [ http://www-istp.gsfc.nasa.gov/Education/wposion.html ] swept out past the Earth [ http://antwrp.gsfc.nasa.gov/apod/earth.html ] on September 28 and 29, causing many auroras [ http://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search?auroras ]. A week ago, a flapping sheet [ http://pluto.space.swri.edu/IMAGE/glossary/IMF.html ] that divides north and south regions of the Sun's magnetic field [ http://www-istp.gsfc.nasa.gov/Education/wimfproj.html ] passed the Earth, again causing auroras. Pictured above is a particularly good image of one of the October 1 northern lights [ http://www.spaceweather.com/aurora/gallery_01oct01.html ]. Taken in Canada [ http://www.cia.gov/cia/publications/factbook/geos/ca.html ]'s Yukon [ http://www.gov.yk.ca/ ], the city lights of Whitehorse [ http://www.city.whitehorse.yk.ca/ ] are seen below dark cloud [ http://antwrp.gsfc.nasa.gov/apod/ap960925.html ]s and a twisting green aurora [ http://antwrp.gsfc.nasa.gov/apod/ap000519.html ].
Expansive Comet Holmes
Title Expansive Comet Holmes
Explanation The spherical coma of Comet Holmes has swollen to a diameter of over 1.4 "million" kilometers, making the tenuous, dusty cloud even bigger than the Sun [ http://www.ifa.hawaii.edu/faculty/jewitt/holmes.html ]. Scattering sunlight, all that dust and gas came from the comet's remarkably active nucleus [ http://hubblesite.org/newscenter/archive/releases/2007/ 40/image/a/ ], whose diameter before the late October outburst [ http://antwrp.gsfc.nasa.gov/apod/ap071026.html ] was estimated to be a mere 3.4 kilometers. In this sharp image, recorded on November 14 with the Canada-France-Hawaii [ http://antwrp.gsfc.nasa.gov/apod/ap000905.html ] Telescope, stars are easily visible right through the outer coma [ http://www.nasa.gov/worldbook/comet_worldbook.html ], while the nucleus is buried [ http://hubblesite.org/newscenter/archive/releases/2007/ 40/image/a/format/web_print/ ] inside the condensed, bright region. The bright region [ http://hubblesite.org/newscenter/archive/releases/2007/ 40/image/d/ ] of the coma seems offset from the center, consistent with the idea that a large fragment drifted away from the nucleus and disintegrated, producing the comet's spectacular outburst. Of course, more recent images [ http://spaceweather.com/comets/gallery_holmes_page20.htm ] of Holmes also show the bright star Mirfak (Alpha Persei) shining through as the comet sweeps slowly through the constellation Perseus [ http://en.wikipedia.org/wiki/Perseus_(constellation) ].
Aurora Over Winnipeg
Title Aurora Over Winnipeg
Explanation What's happening above that city? The city is Winnipeg [ http://www.city.winnipeg.mb.ca/ ], Canada [ http://www.cia.gov/cia/publications/factbook/geos/ca.html ], and the phenomenon is aurora [ http://www.pfrr.alaska.edu/~ddr/ASGP/STRSCOOP/AURORA/SUMMARY.HTM ]. These past few months have been active ones for our Sun [ http://antwrp.gsfc.nasa.gov/apod/ap010924.html ], producing several coronal mass ejections [ http://science.msfc.nasa.gov/ssl/pad/solar/cmes.htm ] (CMEs) of particles [ http://www-istp.gsfc.nasa.gov/Education/wposion.html ] that have swept past our Earth [ http://www.nineplanets.org/earth.html ] and caused many spectacular auroras [ http://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search?aurora ]. Specifically in this case, a CME that occurred on October 9 impacted the Earth on October 11 and 12, causing nearly 12 hours of auroras [ http://www.spaceweather.com/aurora/gallery_12oct01.html ]. The above-pictured aurora [ http://www.spaceweather.com/aurora/gallery_12oct01.html ] had to be very bright to be seen over the lights of Winnipeg, the city well below and in front of the cascading atmospheric airglow [ http://www.geo.mtu.edu/weather/aurora/ ]. Lights reflecting off of a slight haze [ http://www.concord.org/haze/causes.html ] cause an unrelated glow that emanates from some of the buildings.
Shelf Cloud Over Saskatchewa …
Title Shelf Cloud Over Saskatchewan
Explanation Perhaps it's time to go inside. Such thoughts might occur to people witnessing the approach of an impressive shelf cloud [ http://en.wikipedia.org/wiki/Shelf_cloud ]. Shelf clouds are typically seen leading thunderstorms [ http://www.nssl.noaa.gov/faq/faq_tst.php ], although they may precede [ http://en.wikipedia.org/wiki/Gust_front ] any well defined front of relatively cold air. Shelf clouds [ http://www.targetarea.net/photoshe.html ] differ from roll clouds [ http://antwrp.gsfc.nasa.gov/apod/ap060117.html ] because shelf clouds are attached to a larger cloud system lurking above. Similarly, shelf clouds [ http://eo.ucar.edu/webweather/cloudpic1.html ] differ from wall clouds because wall clouds typically trail storm system [ http://www.youtube.com/watch?v=_cl0aw87LqA ]s. The above pictured shelf cloud [ http://www.crh.noaa.gov/sgf/?n=photos_shelfclouds ] was photographed toward the southwest during a trip crossing the prairies of Saskatchewan [ http://en.wikipedia.org/wiki/Sasketchewan ], Canada [ http://en.wikipedia.org/wiki/Canada ] on the Trans-Canada Highway [ http://www.jpgmag.com/stories/1598 ] in 2001 August. A rising Sun [ http://antwrp.gsfc.nasa.gov/apod/ap050503.html ] illuminated the impressive cloud [ http://antwrp.gsfc.nasa.gov/apod/ap050821.html ] from the east as it advanced from the west.
Dueling Auroras
Title Dueling Auroras
Explanation Will it be curtains for one of these auroras? A quick inspection indicates that it is curtains for both, as the designation "curtains [ http://www.exploratorium.edu/learning_studio/auroras/auroraslook.html ]" well categorizes the type of aurora pattern pictured. Another (informal) type is the corona [ http://explorezone.com/snapshots/1999/09_09_aurora.htm ]. The above auroras [ http://www.spaceweather.com/aurora/gallery_01oct01.html ] resulted from outbursts of ionic particles [ http://www-istp.gsfc.nasa.gov/Education/Ielect.html ] from the Sun [ http://antwrp.gsfc.nasa.gov/apod/sun.html ] during the last week of September. A polarity change [ http://www.sciam.com/askexpert/geology/geology9/geology9.html ] in the solar magnetic field [ http://solar.physics.montana.edu/YPOP/Spotlight/Magnetic/ ] at the Earth [ http://antwrp.gsfc.nasa.gov/apod/ap010204.html ] then triggered auroras [ http://pluto.space.swri.edu/IMAGE/glossary/IMF.html ] over the next few days. The above picture [ http://www.spaceweather.com/aurora/gallery_01oct01.html ] was taken on October 3 as fleeting space radiation [ http://www.oulu.fi/~spaceweb/textbook/aurora/proton_aurora.html ] pelted the Earth's atmosphere [ http://csep10.phys.utk.edu/astr161/lect/earth/atmosphere.html ] high above the Yukon [ http://www.gov.yk.ca/ ] in Canada [ http://www.cia.gov/cia/publications/factbook/geos/ca.html ].
Launch of the Sun Pillar
Title Launch of the Sun Pillar
Explanation On January 16, NASA's space shuttle Columbia roared [ http://antwrp.gsfc.nasa.gov/apod/ap011115.html ] into blue morning skies above Kennedy Space Center on STS-107 [ http://spaceflight.nasa.gov/shuttle/ ], the first shuttle mission of 2003. But this is not a picture of that launch [ http://spaceflight.nasa.gov/gallery/images/shuttle/sts-107/ html/03pd0113.html ]! It was taken on the morning of January 16 though, at sunrise, looking eastward toward Lake Ontario from just outside of Caledon, Ontario, Canada. In the picture a sun pillar [ http://ww2010.atmos.uiuc.edu/(Gh)/ guides/mtr/opt/ice/sp.rxml ], sunlight reflecting from ice crystals [ http://www.sundog.clara.co.uk/halo/pillar.htm ] gently falling through the cold air, seems to shoot above the fiery Sun still low [ http://antwrp.gsfc.nasa.gov/apod/ap020902.html ] on the horizon. By chance, fog [ http://antwrp.gsfc.nasa.gov/apod/ap021122.html ] and clouds forming over the relatively warm lake look like billowing smoke from a rocket's exhaust plume [ http://antwrp.gsfc.nasa.gov/apod/ap020308.html ] and complete the launch illusion. Amateur photographer Lauri Kangas stopped on his way to work to record the eye-catching [ http://www.photon-echoes.com ] sun pillar launch.
Stars and Planets in the Hal …
Title Stars and Planets in the Halo of the Moon
Explanation Photographed on [ http://www.photon-echoes.com/ ] March 13th from Caledon, Ontario, Canada, a bright Moon was surrounded by this lovely halo. Planet Jupiter and stars Procyon, Castor, and Pollux also appear within the circle of lunar light. Castor [ http://www.pantheon.org/articles/c/castor.html ] and Pollux, twins in Greek Mythology, are appropriately bright stars of the constellation Gemini [ http://www.astronomical.org/constellations/gem.html ] while Procyon [ http://www.astro.wisc.edu/~dolan/constellations/ hr/2943.html ] is the brightest star in Canis Minor [ http://www.astro.uiuc.edu/~kaler/sow/cmi-p.html ]. The circular halo is produced by six-sided ice crystals [ http://meteoros.de/arten/ee01e.htm ] in thin high-altitude clouds, which refract the moonlight and give the halo a characteristic radius of 22 degrees. For persistent skygazers such apparitions [ http://www.sundog.clara.co.uk/atoptics/phenom.htm ] are relatively easy to see when the Moon and Sun illuminate [ http://www.astro.uiuc.edu/~kaler/sow/atm/atm.html ] planet Earth's skies.
KamLAND Verifies the Sun
Title KamLAND Verifies the Sun
Explanation A large sphere beneath Japan has helped verify humanity's understanding of the inner workings of the Sun [ http://antwrp.gsfc.nasa.gov/apod/ap971028.html ]. The KamLAND sphere [ http://kamland.lbl.gov/Pictures/ ], shown above during construction in 2001, fails to detect [ http://hep.stanford.edu/neutrino/KamLAND/Nontechnical/detection.html ] fundamental particles [ http://particleadventure.org/particleadventure/frameless/fundamental.html ] called anti-neutrinos [ http://hep.stanford.edu/neutrino/KamLAND/Nontechnical/intro.html ] that are known to be emitted by nearby nuclear reactors around Japan [ http://www.cia.gov/cia/publications/factbook/geos/ja.html ]. This triumphant failure can best be explained by neutrinos oscillating [ http://hep.stanford.edu/neutrino/KamLAND/Nontechnical/oscillations.html ] between different types. KamLAND [ http://hep.stanford.edu/neutrino/KamLAND/ ]'s results bolster previous neutrino oscillation [ http://www.ps.uci.edu/~superk/nuosc.html ] claims including that from the Sudbury detector [ http://antwrp.gsfc.nasa.gov/apod/ap010710.html ], a similar large sphere [ http://antwrp.gsfc.nasa.gov/apod/ap010225.html ] beneath Canada [ http://www.cia.gov/cia/publications/factbook/geos/ca.html ] designed to detect all types of neutrinos [ http://www.ps.uci.edu/~superk/neutrino.html ] from the Sun [ http://antwrp.gsfc.nasa.gov/apod/ap980605.html ]. Thus, leading astrophysicists now consider the long standing solar neutrino deficit problem [ http://math.ucr.edu/home/baez/physics/ParticleAndNuclear/solar_neutrino.html ] as finally solved. A new mystery that replaces it is to find a new Standard Model [ http://particleadventure.org/particleadventure/frameless/standard_model.html ] for particle physics [ http://particleadventure.org/particleadventure/ ] that fully explains neutrino oscillations.
Aurora Over Edmonton
Title Aurora Over Edmonton
Explanation Northern and southern locales saw many a beautiful aurora [ http://antwrp.gsfc.nasa.gov/apod/ap020805.html ] over the last week, as particles [ http://www-spof.gsfc.nasa.gov/Education/Ielect.html ] from several large solar flares [ http://antwrp.gsfc.nasa.gov/apod/ap031029.html ] impacted the Earth. Many reported [ http://science.nasa.gov/spaceweather/aurora/gallery_01oct03_page8.html ] unusually red aurora [ http://antwrp.gsfc.nasa.gov/apod/ap031030.html ]s, although colors across the spectrum were also seen. Power grids and orbiting satellites braced for the onslaught [ http://www.space.com/scienceastronomy/power_outage_031031.html ], but little lasting damage was reported. Pictured above [ http://science.nasa.gov/spaceweather/aurora/gallery_01oct03_page2.html ], the Clover Bar Power Plant [ http://www.epcor.ca/Environment/Environmental+Commitment/Statements+and+Policies/Environmental+Statement+of+Clover+Bar+and+Rossdale+Generating+Stations.htm ] was photographed from the banks of the North Saskatchewan River [ http://www.chrs.ca/Rivers/NorthSask/NorthSask_e.htm ] in Edmonton [ http://www.gov.edmonton.ab.ca/ ], Alberta [ http://www.gov.ab.ca/ ], Canada [ http://www.cia.gov/cia/publications/factbook/geos/ca.html ]. A small pond in the foreground reflects predominantly green aurora [ http://antwrp.gsfc.nasa.gov/apod/ap010402.html ] light far in the distance. Two days ago, again unexpectedly, another large solar flare [ http://space.com/scienceastronomy/solar_flares_031103.html ] occurred from sunspot group 10486 [ http://antwrp.gsfc.nasa.gov/apod/ap031027.html ], the site of other recent major flares. This unusually active solar region is now rotating to the far side of the Sun.
Vega Credit: D. Moffatt (DOA …
Title Vega Credit: D. Moffatt (DOA [ http://www.dao.nrc.ca/ ]), ScienceWeb [ http://scienceweb.dao.nrc.ca/ ], Starry Messenger Communications
Explanation Vega is a bright blue star 25 light years away. Vega [ http://stardate.utexas.edu/radio/StarDateDB.FM$RETRIEVE?value=06/15/1996&field=ScriptAirDate&html=Test+Request+Date ] is the brightest star in the Summer Triangle [ http://eagle.online.discovery.com/DCO/doc/1012/world/starshack/starshack080796/starshack.html ], a group of stars easily visible summer evenings in the northern hemisphere. The name Vega [ http://www.astro.wisc.edu/~dolan/constellations/hr/7001.html ] derives from Arabic origins, and means "stone eagle." 4,000 years ago, however, Vega [ http://stardate.utexas.edu/radio/StarDateDB.FM$RETRIEVE?value=05/20/1995&field=ScriptAirDate&html=Test+Request+Date ] was known by some as "Ma'at" - one example of ancient human astronomical knowledge and language. 14,000 years ago, Vega [ http://stardate.utexas.edu/radio/StarDateDB.FM$RETRIEVE?value=07/10/1994&field=ScriptAirDate&html=Test+Request+Date ], not Polaris [ http://www.arcorp.com/polaris.html ], was the north star [ http://antwrp.gsfc.nasa.gov/apod/ap961201.html ]. Vega [ http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1995ApJ%2E%2E%2E450%2E%2E364G&db_key=AST&nosetcookie=1 ] is the fifth brightest star in the night sky, and has a diameter almost three times that of our Sun. Life [ http://www.seti-inst.edu/phoenix/contact.html ] bearing planets, rich in liquid water, could possibly exist around Vega [ http://lsnt7.lightspeed.net/~astronomy/lifezones/lifezones.html ]. The above picture [ http://www.jpl.nasa.gov/comet/moffatt1.html ], taken in January, finds Vega, the Summer Triangle [ http://antwrp.gsfc.nasa.gov/apod/ap961212.html ], and Comet Hale-Bopp [ http://antwrp.gsfc.nasa.gov/apod/ap970610.html ] high above Victoria [ http://www.city.victoria.bc.ca/ ], British Columbia [ http://www.gov.bc.ca/ ], Canada.
The Crab Nebula from CFHT
Title The Crab Nebula from CFHT
Explanation This is the mess that is left when a star explodes. The Crab Nebula [ http://www.seds.org/messier/m/m001.html ], the result of a supernova [ http://imagine.gsfc.nasa.gov/docs/science/know_l1/supernovae.html ] seen in 1054 AD [ http://www.seds.org/messier/more/m001_sn.html ], is filled with mysterious filaments. The filaments [ http://antwrp.gsfc.nasa.gov/apod/ap980208.html ] are not only tremendously complex, but appear to have less mass than expelled [ http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1995ApJ...454L.129F ] in the original supernova and a higher speed than expected [ http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1998PASP..110..831N ] from a free explosion. The above image [ http://www.cfht.hawaii.edu/HawaiianStarlight/AIOM/English/CFHT-Coelum-AIOM-Jan2004.html ], taken by the Canada-France-Hawaii Telescope [ http://www.cfht.hawaii.edu/HawaiianStarlight/English/CFHT-Story.html ] (CFHT), is in three colors chosen for scientific interest. The Crab Nebula [ http://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search?crab ] spans about 10 light-years [ http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question19.html ]. In the nebula's very center lies a pulsar [ http://www.jb.man.ac.uk/~pulsar/Education/Sounds/sounds.html ]: a neutron star [ http://www.astro.umd.edu/~miller/nstar.html ] as massive as the Sun [ http://www.nineplanets.org/sol.html ] but with only the size of a small town [ http://www.cityofhoughton.com/ ]. The Crab Pulsar [ http://antwrp.gsfc.nasa.gov/apod/ap020920.html ] rotates about 30 times each second.
A Full Sky Multicolored Auro …
Title A Full Sky Multicolored Auroral Corona
Explanation On some nights the sky is the most interesting show in town. This fisheye [ http://astronomy.swin.edu.au/~pbourke/projection/fisheye/ ] picture captures a particularly active and colorful auroral corona [ http://www.exploratorium.edu/learning_studio/auroras/auroraslook.html ] that occurred two days ago over l'Observatoire de la Decouverte in Val Belair near Quebec [ http://www.gouv.qc.ca/ ], Canada [ http://www.cia.gov/cia/publications/factbook/geos/ca.html ]. The above spectacular aurora has an unusually high degree of detail [ http://antwrp.gsfc.nasa.gov/apod/ap020115.html ], range of colors [ http://antwrp.gsfc.nasa.gov/apod/ap980901.html ], and breadth across the sky. The vivid green, red, and blue auroral colors [ http://www.exploratorium.edu/learning_studio/auroras/difcolors.html ] are likely caused by high atmospheric oxygen [ http://pearl1.lanl.gov/periodic/elements/8.html ] and hydrogen [ http://pearl1.lanl.gov/periodic/elements/1.html ] reacting to incoming electrons [ http://www-istp.gsfc.nasa.gov/Education/welect.html ]. The trigger events were magnetically induced explosions [ http://science.nasa.gov/ssl/pad/solar/cmes.htm ] on the Sun [ http://antwrp.gsfc.nasa.gov/apod/sun.html ] from sunspot region 696 over the past few days. Continued activity [ http://spaceweather.com/aurora/gallery_01nov04.htm ] from this active solar region could mean more auroras visible to northern observers over the next few days. Early in the morning but far in the background, planets, stars and the Moon will be simultaneously putting on their own show [ http://antwrp.gsfc.nasa.gov/apod/ap041108.html ].
In the Center of the Heart N …
Title In the Center of the Heart Nebula
Explanation What powers the Heart Nebula? The large emission nebula [ http://antwrp.gsfc.nasa.gov/apod/emission_nebulae.html ] dubbed IC 1805 [ http://antwrp.gsfc.nasa.gov/apod/ap040917.html ] looks, in whole, like a human heart [ http://www.pbs.org/wgbh/nova/heart/heartmap.html ]. The nebula glows brightly in red light emitted by its most prominent element: hydrogen [ http://en.wikipedia.org/wiki/Hydrogen ]. The red glow and the larger shape are all created by a small group of stars near the nebula's center. A close up spanning about 30 light years [ http://chandra.harvard.edu/photo/cosmic_distance.html ] contains many of these stars is shown above [ http://www.cfht.hawaii.edu/HawaiianStarlight/AIOM/English/CFHT-Coelum-AIOM-Dec2004.html ] in a recent image taken by the Canada France Hawaii Telescope [ http://antwrp.gsfc.nasa.gov/apod/ap000905.html ]. This open cluster [ http://antwrp.gsfc.nasa.gov/apod/open_clusters.html ] of stars contains a few bright stars nearly 50 times the mass of our Sun, many dim stars only a fraction of the mass of our Sun, and an absent microquasar [ http://antwrp.gsfc.nasa.gov/apod/ap040916.html ] that was expelled millions of years ago. The Heart Nebula [ http://antwrp.gsfc.nasa.gov/apod/ap031022.html ] is located about 7,500 light years [ http://starchild.gsfc.nasa.gov/docs/StarChild/questions/question19.html ] away toward the constellation [ http://www.mallorcaweb.net/masm/descon1.htm ] of Cassiopeia [ http://www.seds.org/Maps/Stars_en/Fig/cassiopeia.html ].
Northern Lights, September S …
Title Northern Lights, September Skies
Explanation So far, the Aurora Borealis or Northern Lights [ http://www.exploratorium.edu/learning_studio/auroras/ ] have made some remarkable visits to September's skies [ http://www.spaceweather.com/aurora/ gallery_01sep05_page5.htm ]. The reason, of course, is the not-so-quiet Sun [ http://science.nasa.gov/headlines/y2005/ 15sep_solarminexplodes.htm ]. In particular, a large solar active region now crossing the Sun's disk has produced multiple, intense flares and a large coronal mass ejection (CME [ http://helios.gsfc.nasa.gov/cme.html ]) that triggered wide spread auroral activity just last weekend. This colorful example [ http://www.geocities.com/photo_geo/nouv.html ] of spectacular curtains of aurora was captured with a fish-eye lens in skies over Quebec, Canada on September 11. Also featured is the planet Mars [ http://science.nasa.gov/headlines/y2005/ 07jul_marshoax.htm ], the brightest object above and left of center. Seen near Mars (just below and to the right) is the tightly knit Pleiades [ http://antwrp.gsfc.nasa.gov/apod/ap050414.html ] star cluster. Although they can appear to be quite close, the northern lights actually originate at extreme altitudes, 100 kilometers or so above the Earth's surface.
Smog Layer Over Upstate New …
nasa, nasaimageofthedaygalle …
The STS-92 Space Shuttle ast …
STS092-713-32
mediatype IMAGE
mediatype image
date 2000-10-21
creator NASA -- Image eol.jsc.nasa.gov/scripts/sseop/photo.pl?mission=STS092&roll=713&frame=32 STS092-713-32 was provided by the eol.jsc.nasa.gov/ Earth Science and Image Analysis Laboratory, Johnson Space Center.
identifier STS092-713-32
Lake Effect Snow in the Unit …
nasa, nasanaturalhazards
Like light radiating from th …
GreatLakes_TMO_2006343
mediatype IMAGE
mediatype image
date 2006-12-09
creator NASA -- NASA Image Of The Day
identifier GreatLakes_TMO_2006343
Deforestation in Monarch But …
nasa, nasaimageofthedaygalle …
Each year millions of monarc …
monarchs_iko_2008034_lrg
mediatype IMAGE
mediatype image
date 2008-02-23
creator NASA -- NASA Image Of The Day
identifier monarchs_iko_2008034_lrg
Deforestation in Monarch But …
nasa, nasaimageofthedaygalle …
Each year millions of monarc …
monarchs_iko_2008034_lrg
mediatype IMAGE
mediatype image
date 2008-02-23
creator NASA -- NASA Image Of The Day
identifier monarchs_iko_2008034_lrg
Deforestation in Monarch But …
nasa, nasaimageofthedaygalle …
Each year millions of monarc …
monarchs_iko_2008034_lrg
mediatype IMAGE
mediatype image
date 2008-02-23
creator NASA -- NASA Image Of The Day
identifier monarchs_iko_2008034_lrg
Biggest Solar Flare on Recor …
nasa, nasaimageofthedaygalle …
View an eoimages.gsfc.nasa.g …
superflarecombo
mediatype IMAGE
mediatype image
date 2001-04-02
creator NASA -- Images courtesy sohowww.nascom.nasa.gov/ SOHO Project , NASA's Goddard Space Flight Center
identifier superflarecombo
Heat Wave in North America: …
nasa, nasanaturalhazards
Scorching summer sun, burnin …
nalstanom_tmo_2006193
mediatype IMAGE
mediatype image
date 2006-07-19
creator NASA -- NASA Image Of The Day
identifier nalstanom_tmo_2006193
Heat Wave in North America: …
nasa, nasanaturalhazards
Scorching summer sun, burnin …
nalstanom_tmo_2006193
mediatype IMAGE
mediatype image
date 2006-07-19
creator NASA -- NASA Image Of The Day
identifier nalstanom_tmo_2006193
Unique Weather Yields Record …
nasa, nasaimageofthedaygalle …
* eoimages.gsfc.nasa.gov/ima …
ndvi_gpcp_aug04
mediatype IMAGE
mediatype image
date 2004
creator NASA -- Imagery created by Jesse Allen, Earth Observatory, using data provided courtesy of the USDA Foreign Agricultural Service and processed by Jenn Small and Assaf Anyamba of the ltpwww.gsfc.nasa.gov/gimms/htdocs/ GIMMS Group at NASA GSFC (NDVI). Rainfall anomaly image based on the precip.gsfc.nasa.gov/ Global Precipitation Climatology Product produced at NASA Goddard Space Flight Center.
identifier ndvi_gpcp_aug04
Heat Wave across the United …
nasa, nasaimageofthedaygalle …
The first full week of Augus …
namerica_ceres_2007220
mediatype IMAGE
mediatype image
date 2007-08-08
creator NASA -- NASA image by Jesse Allen, using data provided courtesy of the CERES team at NASA Langley Research Center. Caption courtesy Denise Stefula, NASA Langley.
identifier namerica_ceres_2007220
Monterrey, Mexico: Image of …
nasa, nasaimageofthedaygalle …
In northeastern Mexico's Nue …
monterrey_l7_1999332
mediatype IMAGE
mediatype image
date 1999-11-28
creator NASA -- NASA image created by Jesse Allen, Earth Observatory, using data obtained from the University of Maryland's www.landcover.org/ Global Land Cover Facility.
identifier monterrey_l7_1999332
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