These three exoplanets are among the least dense ever found, and all attempts to probe their atmospheres have been blocked by a mysterious smog.

Learn more about L 98‑59 d, an exoplanet 35 light‑years away with a deep global magma ocean ...

Two planets crashed into one another in a violent, chaotic collision that astronomers recently witnessed 11,000 light-years away from Earth.

Using the James Webb Space Telescope, astronomers have discovered an example of a new class of exoplanet, and it smells like ...

How does fine dust aggregate into building blocks that ultimately form entire planets like our Earth? A research team led by ...

A hazy, ultra-light “super-puff” planet, Kepler-51d, is hiding its secrets and challenging how scientists understand planet formation.

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 may have discovered a new type of planet beyond our solar system, according to new research. The exoplanet, named ...

Talk about a hot mess. Scientists have uncovered a hellish “lava world” where temperatures soar to a blistering 2,700 degrees Fahrenheit — hot enough to melt rock into a churning ocean of magma and ...

Debate has raged for two decades over whether Pluto should be considered a planet. Some want President Trump to take action via executive order.

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