Virgin Galactic just pushed its flagship aircraft higher and faster than ever before. Here's a look at the SpaceShipTwo in action.
This uranium-based reactor would use nuclear fission energy to power small spacecraft and possibly installations on Mars.
The space agency's Commercial Crew Development effort directs a big chunk of change to four private enterprises, including Jeff Bezos' Blue Origin and Elon Musk's SpaceX.
Today's Google doodle -- the company logo on Google's home page -- and a new documentary commemorate the 50th anniversary of Yuri Gagarin becoming the first man in space.
In a dramatic break with the past, the Obama administration's 2011 NASA budget ends the agency's moon program and calls for shifting manned launches to private industry.
In a Russian research facility, six men are closed into spacecraft-like quarters for 105 days to see how a crew might fare on a trip to the Red Planet. And that's the short trial run.
Space Adventures says the cost of a flight to the International Space Station aboard the Russian Soyuz rocket will go up as much as $20 million in coming years because of inflation.
Space is not kind to the human body. This video reveals exactly what happens to the eyes in zero-g.
NASA issues a call for suggestions on ways to study twin astronauts while one is in space and the other is on Earth.
Today marks the day in history when the first human died during a spaceflight.