The Wandering Planets Of Deep Space
Some planets are cosmic drifters that do not orbit any sun. These rogue worlds wander the cold, dark void of interstellar space entirely on their own, forever untethered to a star.
While we imagine planets as siblings circling a central star, these lonely objects likely formed in solar systems before being kicked out by gravitational chaos. Without a sun to provide warmth, they are frozen, pitch-black spheres drifting through the galaxy. Scientists estimate there could be billions of these nomadic worlds roaming the Milky Way alone. They remain some of the most mysterious and elusive objects in our universe.
Source: Rogue planet