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

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

The planetary system, located 120 light-years away, features four worlds orbiting a red dwarf star and challenges classical formation schemes.

Astronomers have spotted an unusual 'inside-out' planetary system where a rocky world seems to have formed far beyond the realm typically reserved for gas giants.

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 ...

Astronomers have uncovered a distant planetary system that flips a long-standing rule of planet formation on its head. Around the small red dwarf star LHS 1903, scientists expected to find rocky ...

All seven roughly match the size and mass of our own planet and are almost certainly rocky. Researchers announced Wednesday the stunning discovery of seven Earth-like planets orbiting a small star in ...

LONDON — The search for an unknown planet in our solar system has inspired astronomers for more than a century. Now, a recent study suggests a potential new candidate, which the paper's authors have ...