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

Of the solar system’s planets, Saturn piques the human imagination with its signature rings and impressive moon count of 274. But compelling new research reignites theories of an ancient collision ...

Astronomers discover an unusual planetary system with a rocky planet formed outside its gaseous neighbors, challenging ...

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

The system, observed using the European Space Agency's Cheops space telescope, consists of four planets — two rocky and two ...

A newly studied solar system breaks the usual planet pattern, raising fresh questions about how rocky and gas planets form.

A global team of astronomers, led by the University of Warwick, have used a European Space Agency (ESA) telescope to discover ...

The planets around a nearby star seem to be in the wrong order, hinting that they formed through a different mechanism than the familiar one by which most systems grow ...

Astronomers have uncovered a planetary system that challenges conventional theories of planet formation. The system likely includes a rocky planet that formed beyond the orbits of its gaseous ...

Recent research suggests that Saturn's bright rings and its largest moon, Titan, may have both originated in collisions among its moons. While Cassini's 13-year mission expanded our understanding of ...

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.