A group of astronomers has found a solar system 116 light-years from Earth that seems to challenge current theories about how ...

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

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

Analysis of an ancient meteorite suggests that rocky planets both near and distant from the sun may have formed at the same ...

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.

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

Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

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 ...