With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.

A newly discovered exoplanet is rewriting the rules of what planets can be. Orbiting a city-sized neutron star, this ...

Astronomers surveying the outer solar system have revealed that a rare object far beyond Neptune is moving in sync with the eighth planet in an unexpected way. Called 2020 VN40 and first discovered in ...

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 are closing in on one of the most tantalizing possibilities in planetary science, evidence that a previously ...

Something strange is happening on the outskirts of our Solar System. It could be a large, mysterious planet. Or, it could be ...

A low-density, puffy planet orbiting relatively far from a young star in a nearly perpendicular orbit. What's going on? When you purchase through links on our site, we may earn an affiliate commission ...

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 ...