Astronomers have discovered an Earth-size planet orbiting an ultracool red dwarf star similar in size to Jupiter. The red dwarf, located some 55 light-years away, is 100 times less bright than the sun ...

Scientists measured mass and distance of free floating planet drifting through space without star for first time.

The star system V1298 Tau reveals that many planets begin as large, low-density worlds that slowly shrink and shed their ...

In a blow to anyone dreaming that complex life may exist elsewhere in the universe, a new study suggests we're unlikely to ...