A Temperate Planet is a planet with environmental conditions similar to those found on the planet Earth.
The possibility is of particular interest to humans under reasoning that the more similar a planet is to Earth, the more likely it is of sustaining complex extraterrestrial life.
The mediocrity principle suggests that planets like Earth should be common in the universe, while the Rare Earth hypothesis suggests that they are extremely rare.
Philosophers have pointed out that the size of the universe is such that a near-identical planet must exist somewhere. But there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarf stars within the Milky Way galaxy.
11 billion of these estimated planets may be orbiting Sun-like stars.
EBIS (Extrasolar Body Information System):