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

An international team of astronomers has discovered a distant planetary system that challenges long-standing theories of how ...

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

Add Yahoo as a preferred source to see more of our stories on Google. Digital art of distant planet - Dottedhippo/Getty Images On August 24, 2006, our solar system lost a planet. It wasn't by ...

There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as number nine in 2006. Now, a group of international researchers say they may ...

Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that ...

A newly studied solar system breaks the usual planet pattern, raising fresh questions about how rocky and gas planets form.

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

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

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