A mysterious object has caused a long-lasting and extreme dimming of a distant star, but is this object a 'failed star' brown dwarf, or an exceptionally massive super-Jupiter exoplanet?

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

Astronomers have long thought solar systems follow a simple pattern similar to our own: small, rocky worlds orbit close to ...

PARIS, France - 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 ...

Scientists say a nearby red dwarf star hosts a planetary lineup that looks like a mirror image of our own solar system, with ...

By Will Dunham WASHINGTON, Feb 14 (Reuters) - Astronomers have observed a planetary system that challenges current planet formation theories, with a rocky planet that formed beyond the orbits of its ...

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

The telescope primarily detects light in the infrared in order to observe sources such as the first galaxies and protostars.

For decades, scientists have believed that planetary systems typically form with rocky planets close to their star and gas-rich planets farther away. This discovery questions their knowledge.

An inside-out planetary system around the star LHS 1903 is turning everything that astronomers know about planet formation upside down.

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