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Satellites are used for a large number of purposes. Common types include military (spy) and civilian Earth observation satellites, communication satellites, navigation satellites, weather satellites, and research satellites.

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NASA Probe Sees Solar Wind Decline

The 33-year odyssey of NASA's Voyager 1 spacecraft has reached a distant point at the edge of our solar system where there is no outward motion of solar wind. Now hurtling toward interstellar space some 17.4 billion...

Super-Earth Atmosphere

A team of astronomers, including two NASA Sagan Fellows, has made the first characterizations of a super-Earth's atmosphere, by using a ground-based telescope...

Kepler Discovers

NASA's Kepler spacecraft has discovered the first confirmed planetary system with more than one planet crossing in front of, or transiting, the same star...

Pulverized Planet

Tight double-star systems might not be the best places for life to spring up, according to a new study using data from NASA's Spitzer Space Telescope....

Dark Asteroids

NASA is set to launch a sensitive new infrared telescope to seek out sneaky things in the night sky -- among them, dark asteroids that could pose a threat to Earth....

Visitors at the 2010 International Balloon Fiesta in Albuquerque, N.M., not only get the visual stimulation of hundreds of colorful hot-air balloons soaring skyward, but can learn about NASA efforts toward improving aviation via an exhibit focusing on the agency's aeronautics research efforts.

NASA Aeronautics exhibit this year is focusing on its "green aviation" initiative, which seeks to test and integrate technologies for reducing aircraft noise and emissions, maximizing fuel usage and improving air-traffic management.

Aeronautics Showcased at Balloon FiestaIt also features displays on the history of NASA aeronautics research, including a timeline of aviation achievements, a space shuttle tire flown on the shuttle Discovery, cockpit simulators, wind tunnels and even a "virtual airport" where visitors can zoom in to see how NASA’s technology has found its way to use on military, commercial and general aviation aircraft and helicopters.

A display about the Stratospheric Observatory for Infrared Astronomy, which incorporates the world's largest airborne infrared telescope installed in the rear fuselage of a NASA 747SP aircraft, introduces visitors to the infrared spectrum by allowing them to see themselves on a monitor through the lens of an infrared camera.

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