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The Top of the Atmosphere
Atmospheric gases scatter blue wavelengths of visible light more than other wavelengths, giving the Earth’s visible edge a blue halo. At higher and higher altitudes, the atmosphere becomes so thin that it essentially ceases to exist. Gradually, the atmospheric halo…
Cassini Significant Events 01/25/07 – 01/30/07
Cassini Significant Events 01/25/07 – 01/30/07 February 2, 2007 (Source: Cassini Project) Cassini Significant Events 01/25/07 – 01/30/07 The most recent spacecraft telemetry was acquired on Tuesday, January 30, from the Goldstone tracking complex. The Cassini spacecraft is in an…
Detailed View of Arctic Sea Ice
For many years, scientists have expected that climate change will be more rapid and dramatic at the poles than at lower latitudes, an expectation that has been demonstrated both with climate models and recent observations of snow and ice, surface…
Cassini Images Mammoth Cloud Engulfing Titan’s North Pole
Cassini Images Mammoth Cloud Engulfing Titan’s North Pole February 1, 2007 (Source: Jet Propulsion Laboratory) This composite image shows the cloud, imaged at a distance of 90,000 kilometers (54,000 miles) during a Titan flyby designed to observe the limb of…
Arctic Reflection: Clouds Replace Snow and Ice as Solar Reflector
Using satellite observations of sea ice and clouds, scientists discover that Earth’s poles are still effective reflectors for incoming sunlight.
Hubble Probes Layer-cake Structure of Alien World’s Atmosphere
The powerful vision of NASA’s Hubble Space Telescope has allowed astronomers to study for the first time the layer-cake structure of the atmosphere of a planet orbiting another star. Hubble discovered a dense upper layer of hot hydrogen gas where…
Hole Punch Clouds in Acadiana
These “hole punch” clouds were just as apparent from above as they were from below. This MODIS image shows a number of round holes in a blanket of cloud cover over Oklahoma, Arkansas, Louisiana, and Texas. A few of the…
Fires in Southeast Asia
On January 28, 2007, MODIScaptured this image of scores of fires burning across Southeast Asia, mostly in Cambodia around the Tonle Sap. Actively burning fires are marked in red.
Pagan Island, Northern Mariana Islands
Pagan Island (image right) is made up of two volcanoes connected by a narrow isthmus of land. The volcanoes are stratovolcanoes, which are tall, typically cone-shaped structures formed by layers of dense, crystallized lava and less-dense ash and pumice. Mount…
Engineers Investigate Issue on One of Hubble’s Science Instruments
RELEASE : 07-15 Engineers Investigate Issue on One of Hubble’s Science Instruments GREENBELT, Md. – NASA engineers are examining a problem related to the Advanced Camera for Surveys (ACS) aboard the agency’s Hubble Space Telescope. On Jan. 27, the observatory…
Engineers Investigate Issue on One of Hubble’s Science Instruments
RELEASE : 07-15 Engineers Investigate Issue on One of Hubble’s Science Instruments GREENBELT, Md. – NASA engineers are examining a problem related to the Advanced Camera for Surveys (ACS) aboard the agency’s Hubble Space Telescope. On Jan. 27, the observatory…
Cerro Antuco and Laguna de Laja, Chile
Parque Nacional Laguna de Laja is part of Chile’s “Lake District”—a popular tourist destination. A hydroelectric dam at the southwest end holds the lake in place, allowing water to escape via the fast-flowing Rio Laja. The terrain surrounding both the…
Titan Flyby – Jan. 29, 2007
Cassini successfully completed a flyby of Saturn’s moon Titan on Monday, Jan. 29, aiming its infrared eyes on the moon’s murky atmosphere, peering through its thick, smoggy veil, and mapping surface features.
Titan: An Earthlike Alien
Saturn’s mysterious moon Titan is one of the strangest and most Earthlike places in our solar system. Larger than Earth’s moon and the planet Mercury … it’s the only moon in our solar system that has clouds and a dense…
Rain Floods South America
Persistent heavy rains in January 2007 triggered flooding across parts of central South America. The rains may be related to El Niño conditions in the central and eastern Pacific Ocean. El Niño, a warming of the eastern Pacific Ocean around…
Water Storage Anomalies in Mississippi Basin
These images show how terrestrial water storage in the four major sub-basins of the United States’ Mississippi River basin differed from average in January and July 2005.
Lena River Delta, Russia
The Lena River fractures into myriad streams that fan out across the tundra and empty into the Arctic Ocean. During the short summer, it thaws into a wetland of tremendous ecological importance.
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