Add Yahoo as a preferred source to see more of our stories on Google. A mysterious "rogue planet" has been observed gobbling 6 billion tons of gas and dust a second — an unprecedented rate that blurs ...

Far beyond Neptune, astronomers believe a mysterious giant planet is hiding in the darkness. Known as Planet 9, this world could reshape everything we know about our solar system. But is it real — and ...

Want to work for NASA from the comforts of your couch? The space agency is looking to fulfill an amateur astronomer's dream — credit for the discovery of a new planet. NASA is looking for help to find ...

Over the past century, astronomers have speculated about the existence of a mysterious 9th planet lurking in the outer reaches of our Solar System. Although we've never directly observed the elusive ...

A mysterious "rogue planet" has been observed gobbling 6 billion tons of gas and dust a second — an unprecedented rate that blurs the line between planets and stars, astronomers said Thursday. Unlike ...