Scorpius(天蝎座)

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1、Scorpius(天蝎座)Scorpiusisoneoftheconstellationsofthezodiac(黄道十二星座).ItliesbetweenLibra(天秤座)tothewestandSagittarius（人马座）totheeast.ItisalargeconstellationlocatedinthesouthernhemispherenearthecenteroftheMilkyWay（银河）.SagittariusScorpiusScorpiuscontainsmanybrightstars,includingAntares(inchinawecallit心

2、宿二)(αSco),β1Sco(Graffias)MostofthebrightstarsaremassivemembersofthenearestOBassociation（天蝎人马天域）.AntaresisaredsupergiantstarintheMilkyWaygalaxyandthesixteenthbrighteststarinthenighttimeskyAlongwithAldebaran(毕宿五themainstaroftheHalcyone),Spica（角宿一themainstaroftheVirgo）,andRegulus（轩辕十四themainstaro

3、ftheLeo）itisoneofthefourbrighteststarsneartheecliptic(黄道).Antaresisavariablestar（变星）,whoseapparentmagnitude（星等）variesfrom+0.9to+1.8.AntaresisaclassMsupergiantstar,withadiameterofapproximately700timesthatofthesun;ifitwereplacedinthecenterofoursolarsystem,itsoutersurfacewouldliebetweentheorbits(

4、轨道)ofMarsandJupiter.Antaresisapproximately600 light-years(180 pc)fromoursolarsystem.Itsvisualluminosity（绝对光度）isabout10,000timesthatoftheSun.Themassofthestariscalculatedtobe15to18solarmasses.ItslargesizeandrelativelysmallmassgiveAntaresaverylowaveragedensity.AntaresAntaresDeepskyobjectsForthesc

5、ropiuslocatesontheMilkyWay,thisconstellationcontainsmanydeepskyobjectssuchastheopenclustersMessier(梅西耶星团)6(theButterflyClustsr)andMessier7(thePtolemyCluster),andtheglobularclustersMessier4andMessier80.Alsointhesouthernendoftheconstellation,thereistheopenstarcluster（疏散星团）NGC6231.FurtherdetailsF

6、urtherdetailsFurtherdetailsAnterastingerofScorpiusNGC6405TheButterflyCluster(catalogedasMessier6orM6,andasNGC6405)isanopenclusterofstarsintheconstellationofScorpius.Itsnamederivesfromthevagueresemblanceofitsshapetoabutterfly.NGC6475Messier7orM7,alsodesignatedNGC6475andsometimesknownasknownasth

7、ePtolemy(托勒密)Cluster,isanopenclusterofstarsintheconstellationofScorpius.Theclusteriseasilydetectablewiththenakedeye（肉眼）,closetothe“stinger（蜇）"ofScorpius.ZoominNGC6231NGC6231isanopenclusterThisclusterisestimatedabout3.2millionyearsold,an