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- Earth_analog abstract "An Earth analog (also referred to as a Twin Earth, Earth Twin, Second Earth, Alien Earth, Earth 2 or Earth-like planet) is another planet (or world) with environmental conditions similar to those found on the planet Earth.The possibility is of particular interest to humans as it is easily inferred that the more similar a planet is to Earth, the more likely it is of sustaining Earth-like complex extraterrestrial life and civilization. As such it has long been speculated and the subject expressed in science, philosophy, science fiction and popular culture. Advocates of space colonization have long sought an Earth analog as a "second home" while advocates for space and survival would regard such a planet as a potential "new home" for mankind.Before the scientific search for and study of extrasolar planets, the possibility was argued through philosophy and science fiction. The Mediocrity principle suggests that planets like the 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.Some scientific theories speculate that Earth analogs may have existed in our Solar System in the past. In the future, technology may be used by humans to artificially produce an Earth analog. In theory, terraforming could potentially create such a world. Multiverse theory suggests that an Earth analog could exist in another universe or even be another version of the Earth itself in a parallel universe.On November 4, 2013, astronomers reported, based on Kepler space mission data, that 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. The nearest such planet may be 12 light-years away, according to the scientists.Recent scientific findings have greatly influenced the scope of the fields of astrobiology, models of planetary habitability and the Search for Extraterrestrial Intelligence. NASA and the SETI Institute have proposed categorising the increasing number of Earth-like planets found using a measure called the Earth Similarity Index (ESI) based on mass, radius and temperature. According to this measure, the planet currently thought to be most similar to Earth is Gliese 667C c (0.85). Findings have led scientists to report theories of billions of Earth-size planets within the Milky Way alone.".
- Earth_analog thumbnail The_Earth_seen_from_Apollo_17.jpg?width=300.
- Earth_analog wikiPageID "26780222".
- Earth_analog wikiPageRevisionID "605138256".
- Earth_analog hasPhotoCollection Earth_analog.
- Earth_analog subject Category:Planetary_habitability.
- Earth_analog subject Category:Types_of_planet.
- Earth_analog type CelestialBody109239740.
- Earth_analog type HabitableZonePlanets.
- Earth_analog type NaturalObject100019128.
- Earth_analog type Object100002684.
- Earth_analog type PhysicalEntity100001930.
- Earth_analog type Planet109394007.
- Earth_analog type Whole100003553.
- Earth_analog comment "An Earth analog (also referred to as a Twin Earth, Earth Twin, Second Earth, Alien Earth, Earth 2 or Earth-like planet) is another planet (or world) with environmental conditions similar to those found on the planet Earth.The possibility is of particular interest to humans as it is easily inferred that the more similar a planet is to Earth, the more likely it is of sustaining Earth-like complex extraterrestrial life and civilization.".
- Earth_analog label "Earth analog".
- Earth_analog label "Planeta Ricitos de Oro".
- Earth_analog label "Planeta ziemiopodobna".
- Earth_analog label "Terre jumelle".
- Earth_analog label "Двойник Земли".
- Earth_analog label "أرض مناظرة".
- Earth_analog sameAs Planeta_Ricitos_de_Oro.
- Earth_analog sameAs Terre_jumelle.
- Earth_analog sameAs Planeta_ziemiopodobna.
- Earth_analog sameAs m.0bmbdrr.
- Earth_analog sameAs Q2670101.
- Earth_analog sameAs Q2670101.
- Earth_analog sameAs Earth_analog.
- Earth_analog wasDerivedFrom Earth_analog?oldid=605138256.
- Earth_analog depiction The_Earth_seen_from_Apollo_17.jpg.
- Earth_analog isPrimaryTopicOf Earth_analog.