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Significant Event Report for Week Ending 4/14/2000
Cassini Significant Event Report For Week Ending 04/14/00 The most recent spacecraft telemetry data was acquired from the Canberra tracking station on Tuesday, 11 April. The Cassini spacecraft is in an excellent state of health and is operating normally. Spacecraft…
On a Clear Day
Researchers clarified the issues encountered in modeling clear-sky shortwave radiation by assembling a long-term data set of cloud-free days to test the models.
April 24 Marks a Triumphant Ten Years in Space for Hubble Space Telescope
A spectacular morning launch of the Space Shuttle Discovery ten years ago, on April 24, 1990, ushered in a new golden age of astronomy. The payload in Discovery’s cargo bay, NASA’s Hubble Space Telescope, was released by the crew into…
Significant Event Report for Week Ending 4/7/2000
Cassini Significant Event Report For Week Ending 04/07/00 The most recent spacecraft telemetry data was acquired from the Goldstonetracking station on Wednesday, 04/05. The Cassini spacecraft is in anexcellent state of health and is operating normally. On board activitiesincluded transition…
Low Arctic Ozone Level, Winter 1999/2000
Ozone levels in the stratosphere over the North Pole were very low this winter. In this image using data from NASA’s TOMS Earth Probe, blue regions represent the difference between ozone levels observed in the early 1980’s and this winter.A…
The Glowing Eye of NGC 6751
The Hubble telescope has spied a giant celestial “eye,” known as planetary nebula NGC 6751. The Hubble Heritage Project is releasing this picture to commemorate the Hubble telescope’s tenth anniversary. Glowing in the constellation Aquila, the nebula is a cloud…
Suspected Protoplanet May Really Be a Distant Star
Follow-up observations of an unusual object initially suspected to be the first directly detected planet outside our solar system have shown that the object is too hot to be a planet. Astronomers now believe it is more likely that the…
ASTER’s First Thermal Infrared Image
This nighttime thermal-infrared image of northern Eritrea and the Red Sea show the generally lower temperature of the land surface as dark tones and the higher sea surface temperatures as bright tones. Temperature variations on land are due to natural…
Yellowstone Park Boundary from Landsat 7
The boundary between Yellowstone National Park and Targhee National Forest is clearly seen in this Landsat 7 image. On the right side of thevertical line running through the center of the image is mature forest located inside the park. In…
Significant Event Report for Week Ending 3/31/2000
Cassini Significant Event Report For Week Ending 03/31/00 The most recent spacecraft telemetry data was acquired from the Goldsonetracking station on Wednesday, 03/29. The Cassini spacecraft is in anexcellent state of health and is operating normally. The speed of the…
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