The planets around a nearby star seem to be in the wrong order, hinting that they formed through a different mechanism than ...

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

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

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

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.

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

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

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

With this new survey, astronomers have gained a peek inside a stage of exoplanet system formation they have yet to fully ...

Gas giants possibly developed slowly in the solar system. They developed cores layer by layer within a disk of ice and dust ...

General relativity helps explain the lack of planets around tight binary stars by driving orbital resonances that eject or destroy close-in worlds. This process naturally creates a “desert” of ...

Gas giants are large planets mostly composed of helium and/or hydrogen. Although these planets have dense cores, they don't ...