How Cold Are Rogue Planets? The Freezing Worlds Drifting Through Interstellar Space
Imagine standing on a planet where the Sun never rises. There is no warm daylight. No blue sky. No bright star illuminating the landscape. Above you, the sky is permanently black, filled with distant stars that provide almost no warmth. The surface may be covered by ice, the atmosphere may have partially or completely frozen, and temperatures could fall far below anything experienced naturally on Earth's surface. This is one possible environment on a rogue planet . Rogue planets, also called free-floating planets , are planetary-mass objects that are not gravitationally bound to a star. Instead of orbiting a sun, they travel through interstellar space. Some may have formed within planetary systems and later been ejected by gravitational interactions. Others may have formed independently, through processes resembling the formation of stars and brown dwarfs. Because they do not receive continuous starlight, rogue planets are often imagined as frozen worlds. But how cold are they re...