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Tau Ceti f
Tau Ceti f is an unconfirmed planet that may be orbiting the nearby Sun-like star Tau Ceti 11.905 light years from the Sun. It is the fifth planet from Tau Ceti in its system - the outermost planet of the system discovered as of 2012. It is notable due to its predicted habitability and Earth-like properties, with an Earth Similarity Index of 0.71 and an orbit that places it in Tau Ceti's extended habitable zone.〔(【引用サイトリンク】title=Two Nearby Habitable Worlds? - Planetary Habitability Laboratory @ UPR Arecibo )〕 == Discovery == As the other four planets of Tau Ceti, it was detected in 2012 by realizing statistical analyses of the data of the star's variations in radial velocity that were obtained using HIRES, AAPS, and HARPS.
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