Astronomers studying extreme planetary systems have identified worlds so massive that they rival the smallest stars in size.

(Gray News) – A young planet is so close to its parent star that it experiences a consistent blast of energy which evaporates its hydrogen atmosphere, according to the National Aeronautics and Space ...

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 ...

For the first time, a planet has been discovered orbiting a white dwarf, also known as a dead star. This exoplanet, a planet outside of our solar system, is the size of Jupiter and it's known as WD ...

For almost a decade, astronomers have been searching for a ninth planet in the solar system. Recently, new evidence of another possible planet, dubbed Planet Y, was uncovered, and it could be around ...