Add Yahoo as a preferred source to see more of our stories on Google. Astronomers have discovered a distant exoplanet with a tail that stretches over 5.5 million miles long. Astronomers have ...

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 ...

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, ...

Astronomers have discovered a planetary system that appears to flip one of astronomy's most reliable rules on its head; it orbits a small, faint red star known as LHS 1903. LHS 1903 is a cool M-dwarf ...

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 ...

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 ...

Many astronomical objects play by clear rules and fit into neat categories, but brown dwarfs (celestial objects too massive to be mere planets, but too small to be real stars) continue to refuse to ...

A mysterious comet flying through our solar system may be doing more than just passing by—it could help explain how giant planets like Jupiter are born. At a major planetary science conference in ...

Astronomers have discovered a distant exoplanet with a tail that stretches over 5.5 million miles long. Credit: Jose-Luis Olivares / MIT illustration Astronomers have accidentally found a planet with ...