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

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

Surprised astronomers said Thursday they have discovered a star with planets in a bizarre order that defies scientific ...

Astronomers have discovered a planetary system that appears to flip one of astronomy's most reliable rules on its head.

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

Astronomers have discovered a distant exoplanet with a tail that stretches over 5.5 million miles long. Credit: Jose-Luis Olivares / MIT illustration Astronomers have accidentally found a planet with ...

Add Yahoo as a preferred source to see more of our stories on Google. Interstellar object 3I/ATLAS imaged by the Hubble Space Telescope. Could similar objects be the seeds of new planets around young ...

Our Solar System contains eight planets (sorry, Pluto) orbiting around the Sun. But while all planets are important members of the club, if we’re being honest, we know there’s a crown jewel of our ...