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

Kepler-51d is a giant, ultra-light “super-puff” planet wrapped in an unusually thick haze that’s blocking scientists from ...

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

Scientists discover a nearby planet with a molten interior and sulfur-rich atmosphere, L 98-59 d, revealing a possible new ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

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

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

In a distant part of our cosmos, an intriguing new world exists. This newly discovered exoplanet, identified as L 98-59 d, ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. For five consecutive mornings, beginning on Aug. 17, early ...

Kingdom of the Planet of the Apes, the latest sci-fi film from Wes Ball (The Maze Runner) and the direct follow-up to Matt Reeves’ 2017 War for the Planet of the Apes, opens in theaters this weekend.