Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
Project involving skydiver Felix Baumgartner on hold until lawsuit with promoter is resolved.
Microgravity damages human cells, particularly stem cells that repair other cells.
NASA sent two medical doctors, a psychologist and an engineer to aid the rescue effort.
Astronomers locate new planets by looking at the movement or brightness of stars.
Former NORAD officer says aliens are coming on Oct. 13 to warn us about the dangers of gases released into the atmosphere.
The signing officially scraps NASA's previous moon-oriented goal and paves the way for a manned mission to an asteroid by 2025.
Last shuttle flight will be to International Space Station.
The plane, unlike orbiters, would get close enough to the ground to get high-resolution images and chemical sensing data.
The fourth planet from the sun, Mars is one of our closest neighbors in the solar system, and yet it remains a mystery.
U.S. Department of Defense allocated $10.7 billion to boost space-based capabilities in 2009.
Flight test for release from mothership, free flying and landing.
Construction on the space station about be finished in 2011.
When the brothers meet in space, it will mark the first time any siblings, let alone identical twins, have ever met up in space.
The plaintiffs, who are engineers and scientists, claim they should not be forced to agree to unrestricted and intrusive background checks.
Video: An airport in inner Mongolia reportedly shut down due to UFO sightings.
Eco-entrepreneur on politics, energy and Earth's resources.
Russell blogs about the day's top science and eco-news.