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| type = S? 〔 | mass = ~ 〔 | mass_light_ratio = | stars = | appmag_v = 〔 | absmag_v = 〔 | size_v = 0.219′ × 0.204′ 〔 | notes = | names = PGC 42102, LEDA 42102, 2MASX J12365934+1419494 | references = }} Malin 1 is a giant low surface brightness〔 (LSB) spiral galaxy; the prototype of LSB galaxies.〔 It is located away in the constellation Coma Berenices, near the North Galactic Pole. it is the largest known spiral galaxy so far discovered, with an approximate diameter of ,〔 six and a half times the diameter of our Milky Way. It was discovered by astronomer David Malin in 1986 and is the first LSB galaxy verified to exist.〔 As such, it is also the first giant LSB galaxy discovered.〔 Its high surface brightness central spiral is across, with a bulge of . The central spiral is a SB0a type barred-spiral.〔 Malin 1 is peculiar in several ways; its diameter alone would make it the largest barred spiral galaxy ever to have been observed. Malin 1 was found later to be interacting with two other galaxies, namely Malin 1B and SDSS J123708.91+142253.2. Malin 1B is located away from the high surface brightness central spiral of Malin 1, which may be responsible for the formation of the galaxy's central bar. Meanwhile, SDSS J123708.91+142253.2 is located within the huge, faint halo of Malin 1 and might have caused the formation of the extended low surface brightness disc through tidal stripping. Malin 1 was once thought to be over 1,000 times the diameter of the Milky Way which would have made it the largest known galaxy.〔 Due to more detailed study, its low surface brightness disk was measured with higher precision bringing the galaxy down to size though it is still exceptionally large. ==See also== *NGC 6872, another spiral galaxy mistakenly claimed in 2013 as largest spiral galaxy. *NGC 262, another huge spiral galaxy. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Malin 1」の詳細全文を読む スポンサード リンク
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