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Earth analog
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An Earth analog, also called an Earth twin or second Earth, is a planet or moon with environmental conditions similar to those found on Earth. The term Earth-like planet is also used, but this term ma
Artist's representation of a hypothetical habitable exoplanet with three natural satellites
Artist's representation of a hypothetical habitable exoplanet with three natural satellites
Percival Lowell depicted Mars as a dry but Earth-like planet and habitable for an extraterrestrial civilisation.
Percival Lowell depicted Mars as a dry but Earth-like planet and habitable for an extraterrestrial civilisation.
Size comparisons: Kepler-20e and Kepler-20f with Venus and Earth
Size comparisons: Kepler-20e and Kepler-20f with Venus and Earth
Surfaces like this of Saturn's moon Titan (taken by Huygens probe) bear superficial similarities to the floodplains of Earth.
Surfaces like this of Saturn's moon Titan (taken by Huygens probe) bear superficial similarities to the floodplains of Earth.
Kepler-186f
Videos
Kepler-186f is a candidate Earth-sized exoplanet orbiting within the habitable zone of the red dwarf star Kepler-186, the outermost of five planets discovered around the star by NASA's Kepler space te
Earth analog
…Kepler-20f < 14.3 1.03 Slightly larger and likely more massive, far too hot to be Earth-like. Tau Ceti g >1.75 Extremely hot. Not known to transit. Kepler-186f 1.1 Candidate planet. Orbits in the habitable zone. Earth 1 1 Orbits in habitable zone. Venus 0.815 0.949 Much hotter. Kepler-20e < 3.08 0.87 Too hot…
Artist's depiction of Kepler-186f (foreground) as a rocky Earth-like planet in the habitable zone, with the Kepler-186 system visible in the backgroun
Artist's depiction of Kepler-186f (foreground) as a rocky Earth-like planet in the habitable zone, with the Kepler-186 system visible in the background (bottom left). The actual appearance and composition of the exoplanet is not currently known.
Size comparison of Kepler-186f (artist's impression) with Earth along with their projected habitable zones
Size comparison of Kepler-186f (artist's impression) with Earth along with their projected habitable zones
NASA Exoplanet Exploration Program "travel poster" for Kepler-186f
NASA Exoplanet Exploration Program "travel poster" for Kepler-186f
PDS 70
PDS 70