Planetary systems in the Milky Way galaxy tend to follow a particular pattern: rocky planets toward the center, closest to ...

Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that ...

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.

An international research team announces the discovery of a new exoplanet orbiting a binary star system. Named HD 143811 b, ...

A closer look at the planets around a star called LHS 1903 may just flip our understanding of how planetary systems form.

Surprised astronomers said Thursday they have discovered a star with planets in a bizarre order that defies scientific expectations -- and suggests these faraway worlds formed in a manner never seen ...

Out in the Kuiper Belt, the massive doughnut of debris beyond Neptune, about one in 10 kilometer-scale objects have surprised scientists with their unexpected shape. Rather than resembling a ball, ...

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

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

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