|
|
Bent Spoke
| Description |
Bent Spoke |
| Full Description |
A bright spoke extends across the unilluminated side of Saturn's B ring about the same distance as that from London to Cairo. The background ring material displays some azimuthal (i.e., left to right) asymmetry. The radial (outward from Saturn) direction is up in this view. A noticeable kink in the spoke occurs very close to the radius where ring particles orbit the planet at the speed of Saturn's magnetic field. Such a connection is most intriguing to scientists studying these ghostly ring phenomena. If gravity alone were affecting the spoke material, there would be no kink and the entire spoke would be angled toward right, like the bottom portion. That it bends to the left above the kink indicates that some other force, possibly related to the magnetic field, is acting on the spoke material. The shape might also indicate that the spoke did not form in a radial orientation, thus challenging scientists' assumptions about these features. This view looks toward the unlit side of the rings from about 58 degrees above the ringplane. The image was taken in visible light with the Cassini spacecraft narrow-angle camera on Jan. 23, 2007 at a distance of approximately 1.6 million kilometers (1 million miles) from Saturn. Image scale is 10 kilometers (6 miles) per pixel. The Cassini-Huygens mission is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the mission for NASA's Science Mission Directorate, Washington, D.C. The Cassini orbiter and its two onboard cameras were designed, developed and assembled at JPL. The imaging operations center is based at the Space Science Institute in Boulder, Colo. For more information about the Cassini-Huygens mission visit http://saturn.jpl.nasa.gov . The Cassini imaging team homepage is at http://ciclops.org . Credit: NASA/JPL/Space Science Institute |
| Date |
March 7, 2007 |
|
Dust Plume off the Coast of
…
| Title |
Dust Plume off the Coast of Egypt |
| Description |
Dwarfing the Nile, a river of dust flowed out of the deserts of northern Egypt on May 19, 2007. As the Moderate Resolution Imaging Spectroradiometer (MODIS) [ http://modis.gsfc.nasa.gov ] on NASA's Terra [ http://terra.nasa.gov ] satellite passed overhead at 12:05 p.m. local time in Cairo, the sensor captured this image of the dust spreading northward over the Mediterranean Sea from the sandy deserts that span the country. At the margins of the plume, ribbons and ripples of dust are translucent, allowing a glimpse of the desert and water beneath, but in the center, the cloud is opaque, revealing nothing of the surface below. The part of north-central Egypt hidden by the dust plume is the Qattara Depression, the country's lowest point. Dipping down to 133 meters below sea level (436 feet), the depression is home to sandy deserts and dry lake beds that occasionally flood. The sand and fine, lake bed sediments are easily lofted into the air by strong winds that scour the area in late winter and early spring. In the eastern (right-hand) part of the image, the Nile River is lined by narrow ribbons of dull green vegetation. The fan-shaped delta is dotted with tan-colored spots, marking the location of cities and towns. The Nile Valley and Delta make up only a small fraction of the country's total land area, yet they support almost the entire population. The large image provided above has a spatial resolution (level of detail) of 250 meters per pixel. The MODIS Rapid Response Team provides this image in additional resolutions. [ http://rapidfire.sci.gsfc.nasa.gov/gallery/?2007139-0519/Egypt.A2007139.0905 ] The Earth Observatory also provides a 250-meter-resolution KMZ file [ http://earthobservatory.nasa.gov/NaturalHazards/Archive/May2007/Egypt.A2007139.0905.250m.kmz ] of this image for use with Google Earth. NASA image by Jeff Schmaltz, MODIS Rapid Response Team, [ http://rapidfire.sci.gsfc.nasa.gov ] Goddard Space Flight Center. |
|
Nile Delta Dust Storm
| Title |
Nile Delta Dust Storm |
| Description |
On April 17, 2007, desert winds whipped up a severe dust storm over Cairo, according to the Associated Press. Poor visibility shut down Cairo's airport for several hours. At 09:05 UTC the same day, the Moderate Resolution Imaging Spectroradiometer (MODIS [ http://modis.gsfc.nasa.gov ]) on NASA's Terra [ http://terra.nasa.gov/ ] satellite captured this image of dust blowing northward along the Nile and fanning out over the Mediterranean Sea. In this image, dust partially obscures the view of the Nile well inland from the coastline. The dust grows especially thick near the coast, just west of the Nile Delta. A fine gray outline shows the coastal contour through the dust. Just southeast of the storm is a bank of clouds, potentially associated with the same weather system that kicked up the dust around Cairo. NASA image by Jeff Schmaltz, MODIS Rapid Response Team, [ http://rapidfire.sci.gsfc.nasa.gov ] Goddard Space Flight Center. |
|
Nile Delta Dust Storm: Natur
…
nasa, nasanaturalhazards
On April 17, 2007, desert wi
…
nile_tmo_2007107
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-04-17 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
nile_tmo_2007107 |
|
Dust Plume off the Coast of
…
nasa, nasanaturalhazards
Dwarfing the Nile, a river o
…
egypt_tmo_2007139
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-05-19 |
| creator |
NASA -- NASA Image Of The Day |
| identifier |
egypt_tmo_2007139 |
|
Dust Plume off the Coast of
…
nasa, nasaimageofthedaygalle
…
Dwarfing the Nile, a river o
…
ge_07701
| mediatype |
IMAGE |
| mediatype |
image |
| date |
2007-05-19 |
| creator |
NASA -- NASA image by Jeff Schmaltz, rapidfire.sci.gsfc.nasa.gov MODIS Rapid Response Team, Goddard Space Flight Center. |
| identifier |
ge_07701 |
|
|
