行星及月球英文版

会计学行星及月球英文版OverviewThisonlinelessonsconsistsofthechaptersTheSolarSystemThePlanetsMoonsPlanetsofotherstarsMoreinformation:LinksTheSolarSystemWhatistheSolarSystem?IntheUniverse,theSolarSystemisourhomeland,andtheEarthisourhometown.TheSolarSystemTheSolarSystemconsistsofthesuninitscentrenineplanets,circlingaroundthesunmoonsasteroidsandcomets.TheSolarSystemHowdidtheSolarSystemevolve?Scientistsarequitesure,thatinthebeginningofourSolarSystemtherewasahugediscofdirt,rocks,gas,iceetc.Inthemiddleofthisdisc,theSunformeditselfandbegantoglow.Insomedistancesfromthecentre,theplanetsemergedfromtheseringsofdirt,rocksandgas.TheSolarSystemHowlargeisourSolarSystem?TheorbitonwhichPluto(thefarthestplanet)circlesthesun,hasanaveragediameterof5.910.000.000km(Pluto‘sorbitisrathernon-circular).Thesunitself,thelargestobjectinourSolarSystemhasadiameterof1.392.520km.TheSolarSystemHowcanIimaginethesesizesanddistances?ImaginetheSolarSystembeingasoccerground(about100mlong).Thesunwouldbeaglaringorangeinthecentre.Plutowouldencirclethesunattheedgeofthesoccerground,havingthesizeofadustparticle.TheEarthwouldbe1,30mawayfromthe“orange“,havingthesizeofasesameseed.TheSolarSystemThePlanetsMercuryistheplanetthatisclosesttoourSun.Plutoisthefarthest.Remembertheorderoftheplanetslikethis:MyVeryEducatedMotherJustShowedUsNinePlanetswhichmeansMercuryVenusEarthMarsJupiterSaturnUranusNeptunPlutoMercuryWhatareMercury‘sfeatures?secondsmallestplanetnearesttothesunoneMercury-yearisaquarterEarth-yearMercuryisverydifficulttobespottedwiththenakedeyeMercuryhasnomoonsVenusWhatareVenus‘features?itisamediumsizedplanet,2.5timesaslargeasMercurysecondnearesttothesunVenusisverywellvisibletothenakedeye,alwaysclosetothesunbeforesunriseoraftersunsetVenushasnomoonsEarthWhatareEarth‘sfeatures?itisamediumsizedplanet,abitlargerthanVenus(probably)theonlyplanetwithliquidwaterinourSolarSystemtheEarthhasonemoon(probably)theonlyplanetwithintelligentlifeinourSolarSystemMarsWhatareMars‘features?itisasmallsizedplanet,halfaslargeasEarthMarsiswellvisibletothenakedeyeMarshastwomoons:PhobosandDeimosMarshasbeenvisitedbyroboticvehicles:Pathfinder,SpiritandOpportunitythequestionfor(former)lifeonMarsisstillunsolvedJupiterWhatareJupiter‘sfeatures?itisthelargestplanetoftheSolarSystem,morethan1.300EarthscouldfitinsideJupiteriswellvisibletothenakedeyeTheGreatRedSpotonitssurfaceisagiantstormaswideasthreeEarthsJupiterhas63moons!(thelargestareIo,Callisto,GanymedeandEuropa)SaturnWhatareSaturn‘sfeatures?itisthesecond-largestplanetoftheSolarSystem,onlyabitsmallerthanJupiterSaturniswellvisibletothenakedeyethefamousringscanbeseenwithsmalltelescopesSaturnhasatleast34moons!(recentlyaprobelandedonJupiter‘smoonTitan)UranusWhatareUranus‘features?itismediumsizedplanetoftheSolarSystemitisquitefarawaybutstillcanbespottedwithsmalltelescopeslikeSaturn,UranushasasystemofringsSaturnhasatleast27moonsNeptuneWhatareNeptune‘sfeatures?itismediumsizedplanetoftheSolarSystem,onlyalittlebitsmallerthanUranusitisquitefarawaybutstillcanbespottedwithsmalltelescopesNeptunehasfourringsandatleast13moonsPlutoWhatarePluto‘sfeatures?itisthesmallestplanetofourSolarSystemSincePlutoisfarawayandsosmall,youneedamedium-sizedprofessionaltelescopeoragoodamateurtelescopetospotit.NooneknowswhatPlutolookslike–it‘stoofarawayandtoosmall.Thepictureinthebackgroundisanartist‘srendition.Plutohasonemoon:CharonMoonsWhataremoons?Moonsarelikelittleplanetsthatencircletherealplanets.Usually,theyaremuchsmallerthanplanets.Planetscanhavenomoons(likeMercuryandVenus),onemoon(likeEarth)oruptoaverylargenumberofmoons(e.g.63forJupiter).MoonsPhobosandDeimosPhobosandDeimosareMars‘companions.Phobosmeans“fear“,Deimosmeans“panic“.MarsitselfhasbeennamedfortheRomanGodofWar.Theyarequitesmall(<15km)andlookratherlikepotatoesthanlikemoons.MoonsIo,Callisto,GanymedandEuropaThesefourmoonsarethebiggestmoonsofJupiter.Theycanbeseenwithsmalltelescopesorevenwithbinoculars.EuropaIoPlanetsofotherstarsAretheremoreplanetsintheUniverse(exceptfortheonesintheSolarSystem)?Yes,thereareotherplanets,so-calledextra-solarplanets.Butitisverydifficulttospotthem,sincetheyarefarfaraway.PlanetsofotherstarsHowcanplanetsofotherstarsbespotted?Therearetwomainwaysthatastronomerssearchfortheseplanets:Ifyouobserveastarveryaccuratelywithspecialinstruments,youmaybeabletomeasureaslight“wobble“.Thiscanindicateaplanet.Ifyoucanobservemanystarsafternight,youmaysometimesseeonegetslightlyfainterforalittlewhile.Thishappensifaplanetpassesbetweenusandthestar–likeamini-eclipse.MoreInformationSkyWatchlinks:ViewsoftheSolarSystemTheNinePlanetsStarChildCelestiaExplorationActivity:http://learn.arc.nasa.gov/planets/SolarSystemExploration:http://solarsystem.nasa.gov/planets/WelcometothePlanets:http://pds.jpl.nasa.gov/planets/OverviewThisonlinelessonsconsistsofthechaptersTheSolarSystemThePlanetsMoonsPlanetsofotherstarsMoreinformation:LinksMercuryWhatareMercury‘sfeatures?secondsmallestplanetnearesttothesunoneMercury-yearisaquarterEarth-yearMercuryisverydifficulttobespottedwiththenakedeyeMercuryhasnomoonsJupiterWhatareJupiter‘sfeatures?itisthelargestplanetoftheSolarSystem,morethan1.300EarthscouldfitinsideJupiteriswellvisibletothenakedeyeTheGreatRedSpotonitssurfaceisagiantstormaswideasthreeEarthsJupiterhas63moons!(thelargestareIo,Callisto,GanymedeandEuropa)SaturnWhatareSaturn‘sfeatures?itisthesecond-largestplanetoftheSolarSystem,onlyabitsmallerthanJupiterSaturniswellvisibletothenakedeyethefamousringscanbeseenwithsmalltelescopesSaturnhasatleast34moons!(recentlyaprobelandedonJupiter‘smoonTitan)MoonsPhobosandDeimosPhobosandDeimosareMars‘companions.Phobosmeans“fear“,Deimosmeans“panic“.MarsitselfhasbeennamedfortheRomanGodofWar.Theyarequitesmall(<15km)andlookratherlikepotatoesthanlikemoons.MoonsIo,Callisto,GanymedandEuropaThesefourmoonsarethebiggestmoonsofJupiter.Theycanbeseenwithsmalltelescopesorevenwithbinoculars.EuropaIo