Explore astronomy, from the latest trip to the International Space Station to alien planets outside our solar system.
The cost and logistics of paying for, and covering up, a secret mission into space would prove incredibly difficult.
The Jupiter-bound spacecraft is the first solar-powered one to head for the gas giant.
Russia delayed its next manned spacecraft mission to the ISS after an unmanned cargo vessel crashed instead of reaching orbit on August 24.
NASA will have to pore over the captured images to determine where the meteor eventually faded out in Georgia.
While most space energy needs are met with solar technology, sunlight may not always be available to astronauts in space, resulting in a portable nuclear source.
De-manning the International Space Station runs the risk of NASA being unable to repair the space laboratory in the event of an emergency.
Problems with Russian rockets mean the new crew may not arrive before the current crew leaves — putting a hole in the amount of scientific research being done.
Modern man may have problems on Earth, but in low-Earth orbit, we have achieved a spirit of cooperation perhaps unprecedented in human history. Check out 10 awe-inspiring images from the International Space Station.
Astronaut also advocates a return to the moon, traveling to Mars.
Planet may even sparkle like a disco ball when light shines on it.
On March 25, NASA's Swift orbital telescope captured a surge of X-rays from deep space, disgorged by what was clearly an immensely powerful source.
Rocket malfunction could mean that the orbiting lab may soon need to operate with a three-astronaut skeleton crew.
Astronaut argues that landing and exploring the Moon would provide practice for future exploration of the solar system, particularly Mars.
The Hubble replacement could still be scrapped from the NASA project list next year pending Congressional approval of the agency's budget.
Despite the loss of the spacecraft, the International Space Station has enough supplies to last through March 2012.
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