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.