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

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

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

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.

Since the 1990s, scientists have discovered approximately 6,100 planets outside our solar system, called exoplanets.

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

Uranus and Neptune are the two furthest planets in the Solar System and have been visited only once by human spacecraft – by Voyager 2 over 30 years ago – so there is a lot about them that we do not ...