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

Typically, from what astronomers have gathered thus far, star systems follow a tidy logic: small, rocky worlds huddle close to the warmth of their star, while massive gas giants bloat up in the colder ...

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 dubbed ...

By Will Dunham WASHINGTON, Feb 14 (Reuters) - Astronomers have observed a planetary system that challenges current planet ...

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

Planetary parades, or alignments, take place when major planets in the solar system appear aligned from our viewpoint on ...