These mysterious objects born in violent clashes between young star systems aren’t stars or planets

Two grey spheres followed by a trail of white smoke.

Are they stars? Are they planets? Or are they neither? Some rogue planetary mass objects that wander the cosmos alone could be created when young star systems clash, meaning they represent an entire cosmic class of their own. Free-floating, planetary mass objects are bodies with around 13 times the mass of Jupiter that are often … Read more