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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....

NASA's Stennis Space Center is moving ahead in supporting Orbital Sciences Corporation testing of Aerojet's AJ26 engines for commercial cargo flights to the International Space Station.

Orbital plans to launch the first of eight scheduled unmanned cargo missions to the ISS in early 2012. Key steps already have been taken toward that goal as Orbital has successfully tested the Aerojet AJ26 engines that will power the first stage of their Taurus II rocket. Tests on each of the engines were performed by a team of Orbital, Aerojet and John C. Stennis Space Center engineers at NASA’s south Mississippi test facility. The latest test was conducted on March 19 on the E-1 Test Stand.

The initial two engines, tested earlier this year, will be delivered to Orbital at the Wallops Flight Facility launch site in Virginia for integration with the Taurus II’s first stage core.Orbital is developing its Taurus II's cargo logistics system under the joint Commercial Orbital Transportation Services demonstration project with NASA, and is scheduled to carry out its ISS cargo resupply missions under the Commercial Resupply Services contract.

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