The word “big” doesn’t mean much once you leave Earth. Our planet feels massive until you stack it next to Jupiter. Jupiter ...

Astronomers have discovered a new class of exoplanet that defies traditional categories of planetary classification. In a ...

Observations show the universe appears flat, yet its true size and global shape beyond the observable horizon may remain ...

Extreme exomoons with tidal heating and thick, hydrogen-rich atmospheres may be able to create billions of years of ...

“Project Hail Mary,” the movie adaptation to Andy Weir’s 2021 novel about a science teacher attempting to save the Earth from ...

Talk about a hot mess. Scientists have uncovered a hellish “lava world” where temperatures soar to a blistering 2,700 degrees ...

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

The Hubble Space Telescope celebrates 36 years of incredible discoveries, stunning imagery, and a lasting impact on astronomy.

Greek mythology has given a name to a great many objects in our solar system. But perhaps one of the least well understood ...

Sixty-six light-years away, an Earth-sized exoplanet completes an orbit in under six hours, skimming around its star at ...

A thick layer of haze around the ultra-low-density planet Kepler-51d likely obscures not only the strange planet's ...

One of the most fundamental and curious mysteries in the universe is the fact that anything exists at all. That is because ...