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Microscopium
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<p>Microscopium ("the <a href="/facts/Microscope/ldJp0CI3">Microscope</a>") is a minor <a href="/facts/Constellation/nBQqgW8A">constellation</a> in the <a href="/facts/Southern_celestial_hemisphere/PP2aeueF">southern celestial hemisphere</a>, one of twelve created in the 18th century by French <a href="/facts/Astronomer/ronF8j4a">astronomer</a> <a href="/facts/Nicolas-Louis_de_Lacaille/zsd0KHzw">Nicolas-Louis de Lacaille</a> and one of several depicting scientific instruments. The name is a <a href="/facts/Latin/pM3Kge85">Latinised</a> form of the <a href="/facts/Ancient_Greek/LIK7NlUh">Greek</a> word for <a href="/facts/Microscope/ldJp0CI3">microscope</a>. Its <a href="/facts/Star/euBFuo07">stars</a> are faint and hardly visible from most of the non-tropical <a href="/facts/Northern_Hemisphere/EFwyqL25">Northern Hemisphere</a>. </p><p>The constellation's brightest star is <a href="/facts/Gamma_Microscopii/jQrt26o0">Gamma Microscopii</a> of <a href="/facts/Apparent_magnitude/7pCTF1Me">apparent magnitude</a> 4.68, a yellow giant 2.5 times the Sun's mass located 223 ± 8 light-years distant. It passed within 1.14 and 3.45 light-years of the Sun some 3.9 million years ago, possibly disturbing the outer Solar System. Three star systems—<a href="/facts/WASP-7/6seDIvk7">WASP-7</a>, <a href="/facts/AU_Microscopii/IPkKMJgs">AU Microscopii</a> and <a href="/facts/HD_205739/CVyqNBqq">HD 205739</a>—have been determined to have <a href="/facts/Exoplanet/zjfmqfUf">planets</a>, while other star —the Sun-like star <a href="/facts/HD_202628/Pg3Io6dv">HD 202628</a>— has a <a href="/facts/Debris_disk/ClIxTnge">debris disk</a>. AU Microscopii and the binary red dwarf system <a href="/facts/AT_Microscopii/BG8zNEyF">AT Microscopii</a> are probably a wide triple system and members of the <a href="/facts/Beta_Pictoris_moving_group/DnWKFPl5">Beta Pictoris moving group</a>. Nicknamed "Speedy Mic", <a href="/facts/BO_Microscopii/XCsehBkB">BO Microscopii</a> is a star with an extremely fast rotation period of 9 hours, 7 minutes. </p>