Beyond our solar system, countless alien worlds of lava, ice, water and noxious gas swirl through the cosmos. Here are some ...

Located around 100 light-years away from Earth, the exoplanet is shrouded in a thick envelope of steam. This world, designated GJ 9827 d, is around twice the size of Earth, three times more massive ...

A NASA spacecraft rocketed away Monday on a quest to explore Jupiter’s tantalizing moon Europa and reveal whether its vast ...

Astronomers have discovered an exoplanet about half the size of Venus orbiting Barnard’s star, the closest single star to our ...

Newly discovered by astronomers publishing for the journal Astronomy and Astrophysics, Barnard b orbits the closest solo star ...

A sodium cloud detected in the vicinity of an exoplanet named WASP-49 b hints at the presence of a natural satellite, also ...

If you were hoping to see the “mini moon,” you’ve probably been disappointed. But experts say the asteroid was an important ...

Jupiter’s Great Red Spot, the solar system’s largest storm, wiggles like gelatin and contracts like a stress ball, new observations from Hubble Space Telescope find.

In recent years, the number of known extrasolar planets (aka. exoplanets) has grown exponentially. To date, 5,799 exoplanets ...

Sept. 29, Earth captured a new "mini-moon" called 2024 PT5. The bus-size asteroid is expected to orbit our planet for 57 days ...

The Moon, Williams and Zugger say, has an orbit around Earth that isn't as neatly aligned with the equator as you might ...

Scientists discovered that Barnard’s Star wobbles a full 20 inches (50 cm) per second — five times Earth’s effect on the Sun ...