A planetary system 116 light-years from Earth has a peculiar pattern. It could flip the script on how planets form, scientists say.

Gas giants possibly developed slowly in the solar system. They developed cores layer by layer within a disk of ice and dust ...

Astronomers have found a distant world that challenges planetary formation theory, with a rocky planet where gas giants should be.

General relativity helps explain the lack of planets around tight binary stars by driving orbital resonances that eject or destroy close-in worlds. This process naturally creates a “desert” of ...

Astronomers have found a rocky planet where it should not exist, orbiting far from a cool red star. Could this strange ...

With this new survey, astronomers have gained a peek inside a stage of exoplanet system formation they have yet to fully ...

Gas giants are large planets mostly composed of helium and/or hydrogen. Although these planets have dense cores, they don't ...

The official number of exoplanets—planets outside our solar system—tracked by NASA has reached 6,000. Confirmed planets are added to the count on a rolling basis by scientists from around the world, ...

Stargazers can see six planets all in one evening during the second month of the year, especially Mercury, which is usually ...