A new member of the solar system has been detected, the second-largest of its kind, suggesting there may be more like it ...

A computer simulation predicts that the Rubin Observatory will discover millions of previously undetected objects in the ...

Pluto was long considered the ninth planet of the solar system, but changes to the definition of planet got it kicked out of ...

A group of astronomers from across the globe, including a team from the University of Washington and led by Queen's ...

The Sun, the planets, and all the other flotsam and jetsam that constitute the solar system are so insignificant ... local cluster of galaxies is also in motion. The best part: no motion sickness.

Our solar system may have a ninth planet after all ... Two deep infrared surveys taken 23 years apart measured the object's orbital motion. In 1983, the Infrared Astronomy Satellite surveyed ...

the point at which molecular motion stops. But this temperature is not constant throughout the solar system. So-called "empty" space — though it is not actually empty — is far colder than ...

A new Tatooine-like planet outside the solar system may orbit two failed stars ... In a new analysis, researchers found that the brown dwarfs’ motion was changing — a quirk that’s ...