SpaceAstronomers may have found a moon orbiting a rogue planet with no star Exomoons are notoriously hard to spot, but it may be easier around free-floating planets that don't orbit stars – and a team of astronomers may have already found one News
SpaceAn Earth-like planet might orbit our closest single sun-like star Tau Ceti is a star just 12 light years away – and it could host a planet called PXP-4 that sits as close to the star as Earth does to our sun with its year about as long as ours News