![]() ![]() He had seen the spot one hour and a quarter, when it moved a quarter of the solar diameter. In 1859, Le Verrier received a letter from the amateur astronomer Lescarbault, who reported having seen a round black spot on the Sun on March 26 1859, looking like a planet transiting the Sun. A total of two dozen spots seemed to fit the pattern of two intra-Mercurial orbits, one with a period of 26 days and the other of 38 days. Wolf at the Zurich sunspot data center, found a number of suspicious “dots” on the Sun, and another astronomer found some more. The only possible way to observe this intra-Mercurial planet or asteroids was if/when they transited the Sun, or during total solar eclipses. Adams of the position of Neptune before it was seen, in a lecture at announced that the problem of observed deviations of the motion of Mercury could be solved by assuming an intra-Mercurial planet, or possibly a second asteroid belt inside Mercury’s orbit. The French mathematician Urbain Le Verrier, co-predictor with J.C. There have been a number of objects that were once thought to exist by astronomers, but which later ‘vanished’. ![]()
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