Chris Hadfield has conquered space. Now he's conquering the Internet, too.

The Sun has unleashed the most powerful eruption - a solar flare - of 2013 so far.

If Mercury was an orange, the juicy bit would all be dense metallic core, while planets further out would be peaches with pit-like cores – here's why    

Nobody knows what exploded over Siberia in 1908 but the discovery of the first fragments could finally solve the mystery

It's been six long years since world-famous physicist Stephen Hawking got a taste of weightlessness during a zero-G airplane flight from NASA's Kennedy Space Center — but he still wants to feel the real deal aboard Virgin Galactic's SpaceShipTwo rocket plane.The 71-year-old Hawking has been living with neurogenerative disease for decades, but his illness hasn't kept him from taking on adventures t...    

NASA's venerable Mars rover Opportunity has overcome a glitch that put the robot into standby mode late last month, agency officials announced Wednesday."The Opportunity rover is back under ground control, executing a sequence of commands sent by the rover team," NASA officials wrote in a mission update today. "Opportunity is no longer in standby automode and has resumed...    

The golf-cart-sized space explorer put itself in standby mode after sensing a problem on April 22 after routine maintenance

NASA is paying $424 million more to get U.S. astronauts into space, and agency is blaming Congress for extra expense

NASA scientists say a massive storm on Saturn's North Pole looks just like a hurricane on earth, spinning counter-clockwise. Its eye is 20 times bigger than the ones we see on Earth.

SpaceX calls it the "Grasshopper" — it's a rocket that doesn't fall back to Earth haphazardly after launch. It carefully returns itself to the launchpad standing up, right where it started.

The flagship Herschel telescope, the most powerful infrared observatory ever put into orbit, has run out of coolant and stopped working.

Comet ISON is estimated to graze by the Sun in November and now scientists predict it might bring meteors with it

How do you throw up in a place where "up" and "down" don't exist?Puking in the microgravity of the International Space Station can be quite a problem, but that doesn't mean it never happens.Astronauts get sick even in the weightlessness of the orbiting outpost, and thanks to a new video from Canadian Space Agency astronaut Chris Hadfield, everyone on the surface of the Ea...    

For the first time, the company's SpaceShipTwo ignites its rocket motor in mid-flight. Virgin Galactic now hopes to make its first passenger trip to space in 2014.With a sonic boom that resounded above the Mojave Desert, a rocket plane belonging to British billionaire Richard Branson's commercial space venture Virgin Galactic got one step closer to carrying tourists into space.

NASA is calling it "The Rose." By any other name, it's a mammoth storm on Saturn, spanning an estimated 1,250 miles with winds swirling at hundreds of miles per hour. The "false-color" image is among the first batch of high-resolution pictures of Saturn's north pole.