行星及月球英文版_精品文档.ppt

行星及月球英文版_精品文档.ppt

《行星及月球英文版_精品文档.ppt》由会员分享，可在线阅读，更多相关《行星及月球英文版_精品文档.ppt（24页珍藏版）》请在冰豆网上搜索。

PlanetsandMoons,Overview,ThisonlinelessonsconsistsofthechaptersTheSolarSystemThePlanetsMoonsPlanetsofotherstarsMoreinformation:

Links,TheSolarSystem,WhatistheSolarSystem?

IntheUniverse,theSolarSystemisourhomeland,andtheEarthisourhometown.,TheSolarSystem,TheSolarSystemconsistsofthesuninitscentrenineplanets,circlingaroundthesunmoonsasteroidsandcomets.,TheSolarSystem,HowdidtheSolarSystemevolve?

Scientistsarequitesure,thatinthebeginningofourSolarSystemtherewasahugediscofdirt,rocks,gas,iceetc.Inthemiddleofthisdisc,theSunformeditselfandbegantoglow.Insomedistancesfromthecentre,theplanetsemergedfromtheseringsofdirt,rocksandgas.,TheSolarSystem,HowlargeisourSolarSystem?

TheorbitonwhichPluto（thefarthestplanet）circlesthesun,hasanaveragediameterof5.910.000.000km（Plutosorbitisrathernon-circular）.Thesunitself,thelargestobjectinourSolarSystemhasadiameterof1.392.520km.,TheSolarSystem,HowcanIimaginethesesizesanddistances?

ImaginetheSolarSystembeingasoccerground（about100mlong）.Thesunwouldbeaglaringorangeinthecentre.Plutowouldencirclethesunattheedgeofthesoccerground,havingthesizeofadustparticle.TheEarthwouldbe1,30mawayfromthe“orange“,havingthesizeofasesameseed.,TheSolarSystem,ThePlanets,MercuryistheplanetthatisclosesttoourSun.Plutoisthefarthest.Remembertheorderoftheplanetslikethis:

MyVeryEducatedMotherJustShowedUsNinePlanetswhichmeansMercuryVenusEarthMarsJupiterSaturnUranusNeptunPluto,Mercury,WhatareMercurysfeatures?

secondsmallestplanetnearesttothesunoneMercury-yearisaquarterEarth-yearMercuryisverydifficulttobespottedwiththenakedeyeMercuryhasnomoons,Venus,WhatareVenusfeatures?

itisamediumsizedplanet,2.5timesaslargeasMercurysecondnearesttothesunVenusisverywellvisibletothenakedeye,alwaysclosetothesunbeforesunriseoraftersunsetVenushasnomoons,Earth,WhatareEarthsfeatures?

itisamediumsizedplanet,abitlargerthanVenus（probably）theonlyplanetwithliquidwaterinourSolarSystemtheEarthhasonemoon（probably）theonlyplanetwithintelligentlifeinourSolarSystem,Mars,WhatareMarsfeatures?

itisasmallsizedplanet,halfaslargeasEarthMarsiswellvisibletothenakedeyeMarshastwomoons:

PhobosandDeimosMarshasbeenvisitedbyroboticvehicles:

Pathfinder,SpiritandOpportunitythequestionfor（former）lifeonMarsisstillunsolved,Jupiter,WhatareJupitersfeatures?

itisthelargestplanetoftheSolarSystem,morethan1.300EarthscouldfitinsideJupiteriswellvisibletothenakedeyeTheGreatRedSpotonitssurfaceisagiantstormaswideasthreeEarthsJupiterhas63moons!

（thelargestareIo,Callisto,GanymedeandEuropa）,Saturn,WhatareSaturnsfeatures?

itisthesecond-largestplanetoftheSolarSystem,onlyabitsmallerthanJupiterSaturniswellvisibletothenakedeyethefamousringscanbeseenwithsmalltelescopesSaturnhasatleast34moons!

（recentlyaprobelandedonJupitersmoonTitan）,Uranus,WhatareUranusfeatures?

itismediumsizedplanetoftheSolarSystemitisquitefarawaybutstillcanbespottedwithsmalltelescopeslikeSaturn,UranushasasystemofringsSaturnhasatleast27moons,Neptune,WhatareNeptunesfeatures?

itismediumsizedplanetoftheSolarSystem,onlyalittlebitsmallerthanUranusitisquitefarawaybutstillcanbespottedwithsmalltelescopesNeptunehasfourringsandatleast13moons,Pluto,WhatarePlutosfeatures?

itisthesmallestplanetofourSolarSystemSincePlutoisfarawayandsosmall,youneedamedium-sizedprofessionaltelescopeoragoodamateurtelescopetospotit.NooneknowswhatPlutolookslikeitstoofarawayandtoosmall.Thepictureinthebackgroundisanartistsrendition.Plutohasonemoon:

Charon,Moons,Whataremoons?

Moonsarelikelittleplanetsthatencircletherealplanets.Usually,theyaremuchsmallerthanplanets.Planetscanhavenomoons（likeMercuryandVenus）,onemoon（likeEarth）oruptoaverylargenumberofmoons（e.g.63forJupiter）.,Moons,PhobosandDeimosPhobosandDeimosareMarscompanions.Phobosmeans“fear“,Deimosmeans“panic“.MarsitselfhasbeennamedfortheRomanGodofWar.Theyarequitesmall（15km）andlookratherlikepotatoesthanlikemoons.,Moons,Io,Callisto,GanymedandEuropaThesefourmoonsarethebiggestmoonsofJupiter.Theycanbeseenwithsmalltelescopesorevenwithbinoculars.,Europa,Io,Planetsofotherstars,AretheremoreplanetsintheUniverse（exceptfortheonesintheSolarSystem）?

Yes,thereareotherplanets,so-calledextra-solarplanets.Butitisverydifficulttospotthem,sincetheyarefarfaraway.,Planetsofotherstars,Howcanplanetsofotherstarsbespotted?

Therearetwomainwaysthatastronomerssearchfortheseplanets:

Ifyouobserveastarveryaccuratelywithspecialinstruments,youmaybe