A rogue planet is floating through our galaxy

Astronomers have found a “rogue” planet floating through our galaxy, untethered to any sun.

The “free-floating” world is slightly smaller than Earth, making it the smallest such planet ever to be found.

But it could be one of many such rogue planets in the Milky Way, and scientists have suggested they may even outnumber the stars in our galaxy.

The scientists took advantage of an astronomical phenomenon known as "gravitational microlensing" to spot the planet, which revealed itself by bending the light of more distant stars.