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

At the farthest edges of the solar system, strange objects follow paths that defy easy explanation. This story investigates ...

The fourth planet in the system is a rocky world, while the second and third ones are gas planets.

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

By Will Dunham WASHINGTON, Feb 14 (Reuters) - Astronomers have observed a planetary system that challenges current planet ...

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

Surprised astronomers said Thursday they have discovered a star with planets in a bizarre order that defies scientific expectations -- and suggests these faraway worlds formed in a manner never seen ...

A closer look at the planets around a star called LHS 1903 may just flip our understanding of how planetary systems form.

Updated measurements from NASA’s Juno spacecraft could help researchers better understand the planet's mysterious interior, ...

Astronomers have discovered seeds of rocky planets forming in the gas around the baby sunlike star providing *** peek into the start of our own solar system. The the thing that we've discovered is ...

This weekend, six planets are set to share the sky in a rare “planet parade,” giving stargazers a short but magical window to ...