Planetary systems in the Milky Way galaxy tend to follow a particular pattern: rocky planets toward the center, closest to ...
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 found a distant world that challenges planetary formation theory, with a rocky planet where gas giants should be.
Analysis of an ancient meteorite suggests that rocky planets both near and distant from the sun may have formed at the same ...