Something massive may be lurking far beyond Neptune — and scientists think it’s already shaping the solar system. Based on strange orbital patterns, researchers estimate this hidden world could be up ...

“As a professional science communicator who works a lot with space at this age group, I am disappointed," said Dr. Mark Gallaway.

NASA chief Jared Issacman appears to be among those who support Pluto being reclassified as a planet. Could President Trump sign an executive order?

The molten planet, with an atmosphere rich in sulfur-bearing gases, is unlike anything astronomers have ever smelled.

Astronomers have identified a strange new kind of exoplanet that challenges how scientists classify worlds beyond our Solar System. The planet, L 98-59 d, appears to contain a vast ocean of molten ...

Astronomers have discovered a bizarre exoplanet slightly larger than Earth, covered by a vast magma ocean and wrapped in a ...

Oxford-led team found a sulfur-rich exoplanet with a vast magma ocean, 35 light-years away, challenging current planet ...

Discovered in 1930 at the Lowell Observatory, Pluto was demoted as a planet in 2006. Some want President Trump to take action ...

Astronomers long thought they had the galaxy’s planets figured out. It was either a ...

Thursday night had turned to Friday morning when Villanova coach Kevin Willard sat in the press conference room at Madison Square Garden and talked about turning the page. It was another quarterfinal ...

There are worlds like hot Jupiters, gigantic and very hot, as well as ocean worlds and super-Earths with a rocky structure ...