A-collection-of-Hubble-Space-英語(yǔ)教學(xué)提綱

AcollectionofHubbleSpace

AcollectionofHubbleSpaceTelescopeimagesshowsdistantsupernovas(超新星）,thedeathexplosionsofmassivestars.Thetopphotosshoweachregionbeforetheexplosion.Thebottomrowshowstheexplosions‘a(chǎn)ftermaths

AccordingtoNASA（美國(guó)國(guó)家航空航天局）,"OneofHubble'skeydutieswastohelpastronomersdetermineapreciseagefortheuniverse.Thetelescopehelpedastronomersaccomplishthatgoal,narrowingtheuniverse‘sageto13to14billionyearsold.Astronomersmadeobservationsofvariablestars[picturedabove]—pulsating（跳動(dòng)）starsusedtomeasurevastdistances—intheVirgo（仙女星座）andotherclusterstoestablishtheexpansionrateandtheuniverse'sage.".AccordingtoNASA,“Hubbleprovidedastronomerswitha‘scrapbook‘（剪貼本）fullofsnapshots（快照）oftheearlyuniverse…includingpicturesofthe‘deep’universeinaseriesofuniqueobservations:theHubbleDeepFields,theGreatObservatoriesOriginsDeepSurvey,andtheHubbleUltraDeepField（哈勃超深空）[picturedabove].Theobservationsprovidedthedeepestviewsofthecosmos（宇宙）invisible?！盇HubbleSpaceTelescopeimage—showsM87[lowerright]agiantellipticalgalaxy（橢圓星系）.Ellipticalgalaxiesdonottakeontheflat-disk（扁圓）

orspiralshapes（螺旋型）

thatmostgalaxiesdo.TheHubbleSpaceTelescopecapturedthisimageofagammaray（伽馬射線）

explosiononJanuary23,1999.Atthetimeitwasthemostpowerfulexplosioneverrecorded.AcollectionofHubblespacetelescopeimagesshowsgalaxiesthathostquasars.（宿主星系）AHubbleSpaceTelescopeimageshows“proplyds,”orprotoplanetarydisks（圓形星盤）,intheOrionNebula.（獵戶星座）BlackscarsrevealtheaftermathofJupiter‘s（木星）impactwithnearlytwodozenchunks（碎快）fromcometShoemaker-Levy9in1994.Theimpactssenttoweringmushroom-shapedfireballsofhotgasintotheJovian（木星）sky.Glowing（發(fā)光）invibrant（跳躍的）colors,planetarynebulae（行星狀星云）,suchasthisone,representthedeathrattlesofdyingstars.Thesenebulae,whicharenottechnicallyrelatedtoplanets,aregascloudsforcedoutwardbyadyingstar.A