A bizarre planetary pairing 190 light-years away is challenging everything astronomers thought they knew about how worlds form. A “lonely” hot Jupiter — typically found without nearby companions — is ...

Even at a glance, the planets in our solar system are wildly diverse. Huge and small, airless and densely packed with ...

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The red giant star Kepler-56 has a really weird spin, and it may be because it consumed one of its planets. Kepler-56 already has two known exoplanets, but they may have had a long-lost sibling, ...

A strange 200 million-year-old object with the mass of a planet has been discovered 20 light-years from Earth, outside our solar system. The "rogue," as it's referred to by researchers, is producing ...

Astronomers discover water-ice clouds on a cold exo-Jupiter planet, Epsilon Indi Ab, advancing the search for Earth-like ...

Are the planets closest to Earth behaving in unexpected ways? Recent observations of Mercury, Venus, and Mars have left ...

Our Solar System contains eight planets (sorry, Pluto) orbiting around the Sun. But while all planets are important members of the club, if we’re being honest, we know there’s a crown jewel of our ...