The boundary between stars and planets appears increasingly indistinct. Objects such as brown dwarfs, neither fully stars nor fully gas giant planets, blur the well-established categories defined by ...

Stars and planets are inextricably linked. They form together and stars shape the fate of planets. Stars create the dusty protoplanetary disks that give birth to planets of all kinds. And when a star ...

Gas giants, such as Jupiter and Saturn, form from cores of rock and ice first (up to 10 earth masses), then the gravity of ...

Astronomers used the James Webb Space Telescope to probe the object, gathering clues on whether it grew larger over time like ...

Far beyond the reach of any spacecraft, a distant world glows with heat so intense that rock itself turns to vapor. In that ...

In general, anything larger than 13 times the mass of Jupiter has been deemed a brown dwarf, as these objects should be able ...