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.

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

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

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

Scientists have discovered something that they previously thought wasn’t possible – an ‘inside out’ star system. When you ...

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

A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. Located about 120 light years away, the exoplanet appears to take an unusual path around ...