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| Keywords: Daniel Kirkwood.jpg This is a photo of American astronomer Daniel Kirkwood 1814-1895 who identified and explained the Kirkwood Gaps in the main asteroid belt between the orbits of Mars and Jupiter and who explained that Cassini's Division and Encke's Division in the rings of Saturn are caused by the gravitational effects of Saturn's moons PD-old original upload log page en wikipedia Daniel_Kirkwood jpg 2004-11-10 00 23 Cuppysfriend 99×138×8 6485 bytes <nowiki> PD-old </nowiki> DEFAULTSORT Kirkwood Daniel als Daniel Kirkwood de Daniel Kirkwood en Daniel Kirkwood es Daniel Kirkwood fa دانیل کیرکوود ja ニエル・カークウッド sl Daniel Kirkwood sv Daniel Kirkwood zh 丹尼爾·柯克伍德 Daniel Kirkwood Popular Science Monthly/Contributors | ||||
