《原版儿童英语科普读物planets(sciencematters)》

《原版儿童英语科普读物planets(sciencematters)》

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时间:2019-05-24

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1、StudyingPlanetsMuchcanbeseenintheskyonaclearnight.Someobjectsinspacepassbythetwinklingstarsandslowlytravelacrossthesky.Movingspaceobjectsareusuallyplanets.ThewordplanetcomesfromtheGreekwordywhichmeans"wanderer."Earthisoneofthenineplanetsinoursolarsystem.Alloftheplanetstravelaro

2、undtheSun.ThenineplanetsareMercury,Venus,Earth,Mars,Jupiter,Saturn,Uranus,Neptune,andPluto.•Therearemanymoreplanetsintheuniversethanthenineplanetsofoursolarsystem.eIPlanetFactsidyouknowthatEarthistheonlyplanetknownosupportlifeinoursolarsystem?Therearemanyotherinterestingfactsab

3、outthenineplanets.MercuryistheclosestplanettotheSun.Venusisthebrightestplanet.Earthisthedensestspaceobjectinoursolarsystem,Marsisthesecond-closestplanettoEarth.Jupiteristhelargestplanet.Saturnisknownforitscolorfulrings.Uranushasringsandspinsonitsside.Neptuneissurroundedbythickg

4、ases.Plutoisthesmallestplanet.PlanetsinthePastTheancientAztecpeopleswatchedandstudiedtheplanets.Theyprayedtotheobjectstheysawintheskyasgods.VenuswasthemostimportantplanetfortheAztecs.TheplanetVenusrepresentedthegodTlahuizcalpantecuhtli.Thislongnamemeans"LordoftheHouseofDawn."•T

5、heAztecsheldfestivalsfortheplanetVenusatcertaintimesoftheyear.eIPlanetNamesThenameEarthcomesfromanEnglishwordthatpneans"ground"or"soil."TheotherplanetsarenamedafterRomanorGreekgods.MERCURYinessengergodVENUSBTgoddessofloveandbeautyEARTHgroundorsoilMARSgodofwarJUPITERkingofthegod

6、sSATURN^Ç!!!!^offarmingURANUSrgodoftheskyNEPTUNEgodoftheseaPLUTOgodoftheunderworldPlanetPartsEarth,Mars,Mercury,andVenusarecalledterrestrialplanets.Theyconsistmainlyofrock.Someoftheseplanetshaveathinatmosphere.Othershavenoatmosphere.Jupiter,Neptune,Saturn,andUranusaremadeupmost

7、lyofgas.Theyarecalledgasgiants.Theatmospheresoftheseplanetsarethousandsofmilesthick.Plutoismadeupoficeandrock.Itsatmosphereislostasquicklyasitiscreated.Earth'satmosphereismostlymadeupofgases.IPlanetSizesIi.eninepranetsaredifferentsizes.Jupiteristheirgestplanetinoursolarsystem.P

8、lutoissmallerlanEarth'smoon.IAdiameterisameasurementof

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