ScienceNASA: All bags are packed, not yet ready to land on asteroid. Astronauts in training. NASA is preparing for landings on asteroids by 2020 as one of its springboard to Mars. The agency is now training astronauts in a neutral buoyancy pool in preparation for the upcoming missions.by Cez Verzosa
ScienceNASA telescopes record intense X-class solar flare: Best-observed flare of all time [VIDEO]by James Maynard
ScienceChandra Observatory zooms into star clusters. What it finds out challenges conventional belief.by Alexander Saltarin