A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow up 2,000 Earths.

There’s a new object in the distant reaches of our solar system, and it might just offer clues to a long-standing cosmic ...

Astronomers find evidence of a possible ninth planet beyond Neptune, reigniting the debate about the formation of the Solar ...

PARIS: Astronomers announced on Wednesday they have discovered a massive planet orbiting a tiny star, a bizarre pairing that ...

HAT-P-1b is one of the 200 or so planets that have been detected outside our Solar System. It has the largest radius ... Several ideas had been proposed solve the puzzle but none seemed to quite fit, ...

"[T]he puzzle for theoretical astrophysics ... Because many close-matching simulations had the planet-like object swooping ...