A distant 'exomoon' the size of Jupiter is changing how we think about the cosmos.

Are we alone in the universe? For scientists working on NASA's proposed Habitable Worlds Observatory, that question is no ...

The moon has been bathed in solar wind for billions of years, but the two hemispheres are struck by solar wind of different ...

Astronomers have discovered a rare planetary system 71 light-years away, where a Jupiter-sized world orbits a brown dwarf, ...

A shattered asteroid may have unleashed a long-lasting cosmic barrage that left scars across the inner solar system and ...

In a major milestone in the search for life on other planets, astronomers have detected, for the first time, an atmosphere ...

The curious minds at What If explore what would happen if Earth was the center of the solar system.

A violent collision in the main asteroid belt may have sent debris raining across the inner solar system about 800 million ...

Stretching from Topsfield in Washington County to the St. John Valley along U.S. Route 1, it is the largest complete, designed-to-scale solar system model in the world.

By Will Dunham WASHINGTON, July 22 (Reuters) - Scientists are documenting a planetary system in the Milky Way galaxy that is ...

Scientists discover the first confirmed atmosphere in habitable zone outside our solar system on LHS 1140b ...