Astronauts on the International Space Station have been hurling more garbage out the station's back door in recent months. Outdated equipment - some of it expensive - that's not practical for the space shuttle to bring back to Earth is simply being thrown into space.
A new NASA risk analysis is raising fears that the space shuttle could stand a higher chance of being destroyed by space debris than previously thought.
By the end of the year, humans are likely to ride a privately funded spaceship into suborbital space for the first time as a result of the privately funded X-prize competition.
Astronauts on the International Space Station will have less time to conduct science experiments than astronauts on Skylab did 30 years ago, a National Academy of Sciences panel says.