The planet WASP-121b is extreme. It's a gas giant almost twice as big as Jupiter orbiting extremely close to its star–50 ...

If you missed the grand planetary alignment at the end of February, most of the planets aren't going anywhere. Mercury, Venus ...

SpaceX CEO Elon Musk explained why he thinks asteroid could hit Earth at any time and that he wants humanity to find a 'second planet' ...

Scientists found fossil-like traces in gypsum, suggesting ancient microbial life may have existed on Mars billions of years ago.