September 5, 2012 Astronauts aboard the International Space Station took a spare toothbrush along on a spacewalk today and used it to help clean debris from around some bolts. What do you use them for? (Besides brushing your teeth, that is.)
September 5, 2012 Watch as a massive flare shoots from the sun and stretches a half million miles into space. Friday's event dealt Earth's magnetic environment a "glancing blow," NASA says.
August 29, 2012 Neil Armstrong's passing brings back vivid memories of the first moon landing. It also reminds commentator Marcelo Gleiser of the strong links between science and science-fiction.
August 22, 2012 The rover moved forward a short distance, rotated and moved backward. It's fully mobile, NASA engineers say.
August 7, 2012 The Curiosity rover on Mars shows that, perhaps, we are ready to solve our problems. It shows us that we can face impossible challenges and find real, lasting solutions.
August 4, 2012 Scientist Adam Steltzner worries about whether the Mars rover landing equipment he helped design will work. But in his garden, where he approaches things like the engineer he is, he is firmly in charge.
July 25, 2012 Satellite images show that from July 8 to July 12, nearly all of the ice sheet covering Greenland had experienced some melting. According to NASA, it's the biggest summer melt in more than 30 years.
July 24, 2012 Left to other real or imagined urgencies, the singular sense of purpose and promise that space exploration brings can be easily put off until next year, next election, next budget cycle. Eventually, it may be forgotten altogether.
July 10, 2012 NASA has enlisted a crew to test how astronauts will cook and eat on years-long missions to Mars. The volunteers are learning to make French bread and Puerto Rican white bean stew out of shelf-stable ingredients in a low-gravity environment because you can only eat so much freeze-dried ice cream.
June 13, 2012 A 700-pound NASA science satellite roared into orbit Wednesday on a mission to map high-energy features across the universe, including black holes and supernovae. The NuSTAR mission will provide scientists with unprecedented resolution for viewing X-ray objects in space.
May 31, 2012 The first commercial flight to the International Space Station is wrapping up today.
May 30, 2012 Should we send humans or robots into outer space? With private interests taking over the space race, it's hard to see us out of the game.
May 24, 2012 So far everything looks good for a possible docking with the station on Friday by the company's Dragon capsule.
May 19, 2012 The privately funded, unmanned spacecraft was attempting its first flight to the International Space Station. The spacecraft had a one-second window to take off, and the failed launch means it won't be trying again for at least a few days.
May 11, 2012 Flying over an Asteroid