When looking at our solar system, the planets going around the sun seem to be set up in a pretty organized fashion. They are all orbiting in the same direction, and exist on a roughly flat planetary ...

Some experts believe that the solar system's hypothetical ninth planet could be just a few years away from being discovered. If this is the case, how long would it take for humans to send probes to ...

A rogue planet is a world that has been ejected from the planetary system in which it originally formed. Because rogue planets do not orbit a parent star, they are cast adrift into interstellar space.

Currently presenting a faint magnitude of 14.7, Comet 3I/ATLAS is so distant that its light requires nearly 19 minutes to reach Earth.

New research led by an astronomer at the University of Warwick has found the first confirmed example of a double star system that has flipped its surrounding disk to a position that leaps over the ...

The official definition of a “planet” could be set to change again soon. Last time that happened, Pluto was kicked out of the club, but the new proposed definition is designed to be more inclusive.