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Comparing Two Satellite Sensors
full-size images: ETM+ ALI This pair of images shows the same area of South Africa’s Kruger National Park taken by different satellite sensors only minutes apart. The top image is from the Enhanced Thematic Mapper plus (ETM+) aboard Landsat 7, the latest…
What Makes Europa Pink?
The red tinge of Europa, one of Jupiter’s moons, could be caused by frozen bits of bacteria.
Fires in Mali and Senegal
This true-color Moderate-resolution Imaging Spectroradiometer (MODIS) image from October 19, 2001, shows dozens of fires burning in the African countrie of Senegal (left) and Mali (right). North is Mauritania. In roughly the center of Mauritania, the dark brown area indicates…
Taklimakan Desert
The Taklimakan Desert in northwest China is a vast region of sand desert sitting in a depression between two high, rugged mountain ranges. Rolling sand dunes stretch out over several hundred thousand square miles in the Xinjiang Region of China.
Genesis Spacecraft Begins Mission to Collect Samples of the Sun
NASA’s Genesis mission is officially open for business today, as it extends its special collector arrays to catch atoms from the solar wind.
Deep Impact and the Mass Extinction of Species 65 Million Years Ago
On December 3, a scientific deep drilling projects starts on the Yucatan Peninsula, Mexico into the Chicxulub crater that was formed some 65 million years ago by the impact of an asteroid, which is believed to have caused the extinction…
Red Aurora as Seen from the Space Station
Red colors of the aurora are dominant in this image captured by a digital still camera in September 2001. Auroras are caused when high-energy electrons pour down from the Earth’s magnetosphere and collide with atoms. Red aurora occurs from 200…
Hurricane Olga
This image of Hurricane Olga was acquired by the Sea-viewing Wide Field-of-view Sensor (SeaWiFS) on November 28, 2001. At the time the hurricane’s sustained winds were about 85 miles per hour (137 km per hour). Bermuda is just to the…
Convergence Zone over the Patagonian Shelf
The bright waters off the east coast of Argentina mark the convergence of the Malvinas and Brazil Currents. The interaction of the two currents brings nutrients from the dark ocean depths to the sunlit surface, resulting in dense blooms of…
Significant Event Report for Week Ending 11/30/2001
Cassini Significant Event Report For Week Ending 11/30/01 The most recent spacecraft telemetry was acquired from the Madrid tracking station on Wednesday, October 24. The Cassini spacecraft is in an excellent state of health and is operating normally. Information on…
Ship Tracks in a Stratiform Cloud Layer
An example of interactions between aerosols and clouds in the marineatmosphere is apparent in this cloud signature, visible as bands ofpuffy cloud embedded in a layer of stratocumulus. These striking linearpatterns are known as “ship tracks”, and are produced whenfine…
Mars Was Once All Wet
Although covered by frozen deserts today, Mars could have been born with more water in proportion to its mass than the Earth, according to new observations from NASA’s Far Ultraviolet Spectroscopic Explorer (FUSE) spacecraft.
Snowstorm Blankets Midwestern U.S.
An early blast of wintry weather swept across the midwestern United States on November 27-28, 2001, leaving a wide swath of snow and ice on the ground extending from northern Texas up into the Dakotas and as far east as…
Hubble Makes First Direct Measurements of Atmosphere on World Around another Star
Astronomers using NASA’s Hubble Space Telescope have made the first direct detection of the atmosphere of a planet orbiting a star outside our solar system and have obtained the first information about its chemical composition. Their unique observations demonstrate that…
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