太空探索英语PPT

Universeisaunitythatformedbyspace,time,materialandenergy.Itisaspace-timecontinuumsystem.TheoriginoftheuniverseThereismanytheoryabouttheoriginoftheuniverse.ThebigbangtheoryisoneofthemostinfluentialtheoryTheshapeoftheuniverseremainsunknown,buthumanshaveallkindsofimagination.AsmallcellAprogramItisinvisibleTheageofuniverseTheuniverseisabout13.7billionyearsolds.ThesolarsystemThedistancebetweentheearthandthesunis1.5×108KmNineplanets?Maybe.TycheTheMilkyWayTheMilkyWayFormedbyonehundredandtwentybillionstarsandalargenumberofclusters,nebula,andvarioustypesofinterstellargasandinterstellardust.ThescopeoftheMilkyWaygalaxyisabout1.0×105l.y.(光年)LookfromtheflankoftheMilkyWay,itislikeaflatplate.TheBlackHoleBlackholeisastronggravitationalpullobjectinwhichevenlightcannotescapefromit.Howastarbecomeablackhole?Ablackholecapturethestars.WormholeWormholeisthenarrowtunnelthatconnectthetwodifferenttimeandspace.ItisputforwardbyEinsteinandNathanRosen.Itcanhelpyoureturntoformerorgotofuture.“Negativequality”(负质量)SeriesofstrangeobjectsBlackwidownebulaSauronmagicaleyeHellplanetZombie(僵尸)starsOrion'sbatSmallghostnebula