The latest news on NASA
The telescope has discovered more than 132 potentially habitable planets since being launched in 2009.
The sun unleashed two X-class flares on Sunday and Monday, the largest of the year.
The International Space Station's cooling system began leaking Thursday.
If not plugged, the station could have to shut down part of its cooling system.
Liquid salt can be used to power spacecraft.
Buzz Aldrin says the 'planetary defense exercise' is a waste of time.
The mission is designed to test NASA's spacecraft, with side benefit of creating an asteroid defense capability.
NASA scientist Roger Wiens talks about the role Mars Rover Curiosity plays in the future of space exploration.
More than 100 students met the president.
State Department officials turned the spaceballs over to NASA for examination.