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.

A small international team of astronomers has confirmed that a binary star system with an odd signal has a companion—a planet ...

An international team of astronomers reports the discovery of a new giant exoplanet around an M-dwarf star (GEMS). The ...

At long last, particles of water–ice have been discovered in the frozen Kuiper Belt of another star. The discovery, made by ...

It happened 4.5 billion years ago, when the solar system was full of orbiting space rocks. This debris clumped up in a ...

China's first asteroid sample-return mission, Tianwen 2, is scheduled for launch within the next two weeks from the Xichang ...

From gravel-size meteoroids to mountain-size asteroids and even visitors from other star systems, space is packed with ...

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There, it began orbiting the Earth as it does now. Still under construction Most big asteroids and comets collided with the Earth when it was young, about 4½ billion years ago. The number of such ...