Planet hunters have grown used to strange worlds, but a handful of discoveries now point to something even more radical: ...

Astronomers are just beginning to scratch the surface of the complex, and sometimes violent, relationships between planets ...

A FIERY hell-world that would instantly roast visitors alive has a vast lava ocean – and may be packed with rare gems. The ...

This illustration shows an exoplanet orbiting around two brown dwarfs –– objects bigger than gas-giant planets but too small to be proper stars. ESO/M. Kornmesser Astronomers have discovered a ...

Ultra-hot Jupiters — named as such because of their physical similarities to the planet Jupiter — are exoplanets that orbit stars other than the sun with temperatures so high that the molecules 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 ...

14 Herculis c one of at least two gas giants – both significantly bigger than Jupiter – that have been observed orbiting a central star in an X-like pattern. Among the nearly 6,000 exoplanets so far ...