【英语科普】宇宙正在缓慢消亡

宇宙正在缓慢消亡Aninternationalteamofastronomers1studying200,000galaxies2hasmeasuredtheenergygeneratedwithinalargeportionofspacemoreprecisely3thaneverbefore,discoveringthatit'sonlyhalfwhatitwas2billionyearsagoandfading-theUniverseisslowlydying.ResearchersfromtheInternationalCentreforRadioAstronomyResearch(ICRAR)inWesternAustraliausedsevenoftheworld'smostpowerfultelescopestoobservegalaxiesat21differentwavelengths5fromthefarultraviolettothefarinfrared6.InitialobservationswereconductedusingtheAnglo-AustralianTelescopeinNewSouthWalesandsupportingobservationsweremadebytwoorbitingspacetelescopesoperatedbyNASAandanotherbelongingtotheEuropeanSpaceAgency.TheresearchispartoftheGalaxy7andMassAssembly(GAMA)project,thelargestmulti-wavelength4surveyeverputtogether."Weusedasmanyspaceandground-basedtelescopeswecouldgetourhandson,tomeasuretheenergyoutputofover200,000galaxiesacrossasbroadawavelengthrangeaspossible,"saysICRARProfessorSimonDriver,whopresented1宇宙正在缓慢消亡thefindingsattheInternationalAstronomical8Union'sGeneralAssemblyinHonolulu.Thesurveydata,releasedtoastronomersaroundtheworld,includes200,000galaxieseachmeasuredat21wavelengthsfromtheultraviolettothefarinfraredandwillhelpscientistsbetterunderstandhowdifferenttypesofgalaxiesform.ProfessorDriver,whoheadsuptheGAMAteam,saysthestudysetouttomapandmodelalloftheenergygeneratedwithinasetvolumeofspace.AllenergyintheUniversewascreatedintheBigBangwithsomeportionlockedupasmass.StarsshinebyconvertingthismassintoenergyasdescribedbyEinstein'sfamousequationE=MC2."WhilemostoftheenergysloshingaroundwascreatedintheaftermathoftheBigBang,additionalenergyisconstantlybeingreleasedbystarsastheyfuseelementslikehydrogenandheliumtogether,"ProfessorDriversays.2宇宙正在缓慢消亡"Thisnewlyreleasedenergyiseitherabsorbedbydustasittravelsthroughthehostgalaxy,orescapesintointergalacticspaceandtravelsuntilithitssomethingsuchasanotherstar,planet,orveryoccasionallyatelescopemirror."3