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

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find, announced ...

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

The Solar System is far larger than the neat diagrams found in textbooks. Beyond the planets lies a vast region of icy debris ...