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DBpedia 2015-10

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Matches in DBpedia 2015-10 for { ?s ?p "From the total of 1968 known exoplanets orbiting around 1248 different stars (as of October 1, 2015), only a small fraction are located in the vicinity of the Solar System. At the beginning of 2015, the nearest 71 confirmed exoplanets were located within 50 light-years (15.3 pc), with some 38 other unconfirmed candidates. Among the estimated 1,400 stars located within 50 light-years, only 37 have confirmed planetary systems and 13 have only unconfirmed exoplanets. Of the 133 stars within 50 light-years that are bright enough to be visible with the naked eye, and only 18 have confirmed planetary systems. Among the nearest 100 known star systems that are less than 20 light-years away, only three (Gliese 674, Gliese 876, and Gliese 832) have confirmed exoplanets, although proposals have been made for another ten systems.Reports of planetary systems first came in 1996 for three stars located over 40 light-years away: 55 Cancri, Upsilon Andromedae, and 47 Ursae Majoris. Since 1999, more planets have been reported, including a total of five planets revolving around 55 Cancri, and four planets around Gliese 876 and Upsilon Andromedae. Eight star systems have three confirmed planetary partners, four others have only two planets, while the remaining 20 systems have only one confirmed planet. A total of seven planets have been suggested for Gliese 667 C (only two have been confirmed), six around HD 40307 (three confirmed), and a total of five planets revolving around Tau Ceti (not yet confirmed).The closest exoplanet widely accepted as confirmed is Gliese 674 b, 14.8 light-years away from our Solar System. Among the other 42 closer star systems, some have been suggested to contain planetary companions, including the closest system, Alpha Centauri (4.1 light-years away), with a companion that may be similar in size to Earth. Of the known planetary systems, 21 are located within 40 light-years, eleven are within 30 light-years, and only four are within 20 light-years.Among of the 71 planets within 50 light-years which had been confirmed by the beginning of 2015, more than half were found to revolve around their star closer and complete an orbit faster than Mercury does around the Sun, and 18 have a more eccentric orbit than that of Mercury. Considering their minimum masses, 50 exoplanets are expected to be gas giants, and only 21 under ten times more massive than Earth. The smallest of these has an estimated minimum mass of 2.4 times that of Earth's and revolves around 82 G. Eridani, 20 light-years away. A few exoplanets within 50 light-years have been hypothesized to be potentially habitable, including Gliese 667 Cc and Gliese 163 c, but only three have been directly imaged: Fomalhaut b, Ross 458(AB) c, and VHS 1256-1257 b. In 2015, the International Astronomical Union announced intention allow the public to vote on renaming some exoplanetary systems, among which: Epsilon Eridani, Fomalhaut, Pollux, 55 Cancri, Upsilon Andromedae, Gamma Cephei, 47 Ursae Majoris, and Mu Arae."@en }

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