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1、宇宙的起源英語◎懸賞分：30?解決時間：2009-3-2915:40需要做一個課件幫忙找一篇文章，關(guān)于宇宙的起源，“BigBang”theory以及地球早期的形成不用很長，大概600-1000詞即可謝謝問題補充：感謝1L的朋友但是不用這么詳細稍微范一點就好不用太多專業(yè)術(shù)語，扯點霍金之類的只是大致的介紹…最好能給兒個問題，就當(dāng)給出的文章是英語閱讀?.再出兒個問題（3?5個）謝謝提問者：wuzihao94-高級魔法師五級最佳答案TheBigBangisthecosmologicalmodeloftheinitialconditionsandsubsequentdev
2、elopmentoftheuniversesupportedbythemostcomprehensiveandaccurateexplanationsfromcurrentscientificevidenceandobservation.[1][2]Asusedbycosmologists,thetermBigBanggenerallyreferstotheideathattheuniversehasexpandedfromaprimordialhotanddenseinitialconditionatsomefinitetimeinthepast,andcon
3、tinuestoexpandtothisday.ThescientistandRomanCatholicpriestGeorgesLemaitreproposedwhatbecameknownastheBigBangtheoryoftheoriginoftheUniverse,althoughhecalledithis“hypothesisoftheprimevalatom11.TheframeworkforthemodelreliesonAlbertEinstein'sgeneralrelativityandonsimplifyingassumptions(s
4、uchashomogeneityandisotropyofspace).ThegoverningequationshadbeenformulatedbyAlexanderFriedmann.AfterEdwinHubblediscoveredin1929thatthedistancestofarawaygalaxiesweregenerallyproportionaltotheirredshifts,assuggestedbyLemaitrein1927,thisobservationwastakentoindicatethatallverydistantgal
5、axiesandclustershaveanapparentvelocitydirectlyawayfromourvantagepoint:thefartheraway,thehighertheapparentvelocity.[3]Ifthedistancebetweengalaxyclustersisincreasingtoday,everythingmusthavebeenclosertogetherinthepast.Thisideahasbeenconsideredindetailbackintimetoextremedensitiesandtempe
6、ratures,andlargeparticleacceleratorshavebeenbuilttoexperimentonandtestsuchconditions,resultinginsignificantconfirmationofthetheory,buttheseacceleratorshavelimitedcapabilitiestoprobeintosuchhighenergyregimes?Withoutanyevideneeassociatedwiththeearliestinstantoftheexpansion,theBigBangth
7、eorycannotanddoesnotprovideanyexplanationforsuchaninitialcondition;rather,itdescribesandexplainsthegeneralevolutionoftheuniversesincethatinstant.Theobservedabundancesofthelightelementsthroughoutthecosmoscloselymatchthecalculatedpredictionsfortheformationoftheseelementsfromnuclearproc
8、essesinthera
