British scientist Simon Conway Morris believes there are only two possibilities for alien life; either we're alone or aliens exist, and they are out to get us.
Billows of smoke and steam infused with the fiery light from space shuttle Endeavour's launch on the STS-127 mission fill NASA Kennedy Space Center's Launch Pad 39A on July 15, 2009.
A burping black hole, water in weird places, and whopper-size new planets are some top space stories of 2010. If you have different discoveries on your list, post them in the comments section.
Geminid meteor shower 2010 climaxes between midnight Monday and dawn Tuesday. But the spectacle also poses a question: Why is the asteroid that supplies the meteorites breaking apart?
Scientists say that Mars went through three ages, and the first age may have been habitable for life as we know it. Each stage on Mars can be found at nine different locations around the planet Earth today.
The Akatsuki Venus probe failed to enter orbit Monday night, leading some to speculate that the Japanese spacecraft was struck by something.
New calculations indicate that Pluto might be the largest object in the outer solar system. Does it now deserve to be called a planet again?
The alien world has already gone through the red giant phase of stellar evolution, a milestone our sun should reach in 5 billion years or so. The fact that the newly discovered exoplanet survived this dramatic event suggests some planets in our solar system might, too.
NASA's recently announced Solar Sail demonstration mission will deploy and operate a sail area 7 times larger than ever flown in space with potential applicability to a wide range of future space missions, including use in an advanced space weather warning system to provide more timely and accurate notice of solar flare activity.