Jisho

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水星衛星
Wikipedia definition
1. Mercury's moonA moon orbiting Mercury was, for a short time, believed to exist. On March 27, 1974, two days before Mariner 10 made its flyby of Mercury, instruments began registering large amounts of ultraviolet radiation in the vicinity of Mercury which, according to one astronomer, "had no right to be there". By the next day, the radiation had disappeared; it reappeared three days later, appearing to originate from an object which was, seemingly, detached from Mercury.
Read “Mercury's moon” on English Wikipedia
Read “水星の衛星” on Japanese Wikipedia
Read “Mercury's moon” on DBpedia

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