ネメシス (恒星)
1. Nemesis (hypothetical star)Nemesis is a hypothetical hard-to-detect red dwarf star or brown dwarf, originally postulated in 1984 to be orbiting the Sun at a distance of about 95,000 AU, somewhat beyond the Oort cloud, to explain a perceived cycle of mass extinctions in the geological record, which seem to occur more often at intervals of 26 million years. As of 2011, over 1300 brown dwarfs have been identified and none of them are inside the Solar System.
Read “Nemesis (hypothetical star)” on English Wikipedia
Read “ネメシス (恒星)” on Japanese Wikipedia
Read “Nemesis (hypothetical star)” on DBpedia
Read “Nemesis (hypothetical star)” on English Wikipedia
Read “ネメシス (恒星)” on Japanese Wikipedia
Read “Nemesis (hypothetical star)” on DBpedia
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