Earth analog

Planet with environment similar to Earth's

An Earth analog, also called an Earth twin or second Earth, is a Exoplanet or moon with environmental conditions similar to those found on Earth. The term Earth-like planet is also used, but this term may refer to any terrestrial planet. The possibility is of particular interest to astrobiologists and astronomers under reasoning that the more similar a planet is to Earth, the more likely it is to be capable of sustaining complex extraterrestrial life.

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