Science editor Alan Boyle's blog: After a long delay due to legal snags, a skydiver is once again gearing up for a supersonic free-fall that would break a record set 52 years ago.

If you've ever dreamed of becoming an astronaut and have four months to spare, you might have the "right stuff" to fly to Mars … well, sort of.

The surface of Mars may have been parched for too long for any life-forms to exist on the planet today, a new study suggests.

The recent delay of the next manned launch to the International Space Station because of a damaged Russian space capsule highlights NASA's critical need for commercially built vehicles, space policy experts say.

This year is key for Virgin Galactic's bid to become the first commercial spaceliner service, as rocket-powered flights of its SpaceShipTwo are on the books for summer.

Felix Baumgartner is set to dive out of a compressed capsule from over 120,000 feet. Becoming the first human to break the sound barrier in free fall and topping the altitude record are two of the goals.

Skydiver Felix Baumgartner would be the first person to break the sound barrier outside an aircraft.

See incredible photos of the planning involved in making a world-record breaking parachute jump.

Europe's Mars Express probe was launched in June 2003 and arrived at the Red Planet in December of that year.

The Mars Express probe detected strong evidence that there were large bodies of liquid water on ancient Mars.

Skywatching tips for observing the Twin Brothers constellation.

The galaxy is 10 billion light-years away and offers a glimpse into early star-forming galaxies.

Thousands of mini-galaxies have been predicted but never seen in what's called the missing satellites problem.

The politically charged comedian gives his appreciation for the space agency's research on the International Space Station that is helping to create vaccines to the some of the world's deadliest diseases.

The Sun unleashed a whipping filament hundreds of thousands of miles long on Sunday February 5th, starting around 1:45pm EST. The display was caught by the many different filtered camera's aboard NASA's Solar Dynamics Observatory.

A new study of soil on Mars could indicate that the planet's surface is too hostile to support life.

From a stunning image of our marbled earth to city lights from space, it's been a remarkable week for space photography.

Colonies on the moon, fast-spinning stars and an astronaut playing an astronaut are just a few of several big stories in space for the week.

NASA's Juno probe is the first solar-powered spacecraft to the outer solar system.

The close pass of the asteroid Eros this week allows astronomy buffs to measure the size of the solar system.

Scientists will study diet & nutrition for "astronauts" who spend four months in a mock space capsule.

Not since 1978 have so many people wanted to be a NASA astronaut.

See photos of the asteroid Eros taken by NASA's NEAR space probe in 2000, and other observers.

NASA has a critical need for commercially built spacecraft to fill the gap in human spaceflight.