Over the past century, astronomers have speculated about the existence of a mysterious 9th planet lurking in the outer ...

A newly-discovered planet named Enaiposha, GJ 1214 b, is unlike anything found in our own solar system, similar to a ...

Add Yahoo as a preferred source to see more of our stories on Google. An artist's impression shows the "inside out" planetary system around the star LHS 1903. - ESA An exoplanetary system about 116 ...

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds silently loop around their stars. Some drift as far as 10,000 times the distance ...

A strange planetary system called TOI-201 is changing in real time, with three very different worlds pulling on each other.

TUCSON, Ariz. (KGUN) — What started as a mysterious red dot in images taken by University of Arizona astronomers has been confirmed as a huge, newly forming planet — and University of Arizona’s ...

Astronomers have discovered a remarkable planetary system where three very different objects orbit a distant star—and their ...

The strangest part of the TOI-201 system is not that it holds three very different worlds. It is that astronomers can ...

"Most planetary systems appear as 'peas in a pod.' This is not the case in the TOI-201 system." ...

An artist's impression shows the "inside out" planetary system around the star LHS 1903. - ESA An exoplanetary system about 116 light-years from Earth could flip the script on how planets form, ...

NEW YORK (CNN) — An exoplanetary system about 116 light-years from Earth could flip the script on how planets form, according to researchers who discovered it using telescopes from NASA and the ...