八大行星英文
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2023年3月20日发(作者：植物组)2
◆太阳系九大行星英语名称、音标及记忆方法：
序号名称英语单词音标
1水星Mercury['mə:kjuri]
2金星Venus['vi:nəs]
3地球Earth[ə:θ]
4火星Mars[ma:s]
5木星Jupiter['dЗu:pitə]
6土星Saturn['sætə(:)n]
7天王星Uranus['ju:ərənəs]
8海王星Neptune['neptju:n]
9冥王星Pluto[ˈplu:təu]
◆Easywaystoremembertheorderoftheplanetsarethemnemonics:"MyVeryExcellent
MotherJustSentUsNinePizzas"and"MyVeryEasyMethodJustSimplifiesUsNaming
Planets"Thefirstletterofeachofthesewordsrepresentsaplanet-inthecorrectorder.
每个单词的词首恰好是各个行星名字的首字母，顺序也吻合一起读10遍，记住了吗？
◆例句：
1、水星Mercury['mə:kjuri]
Alas,Mercury,assaid,willberetrograde,sowehavetofactorthisintothe
mixofthemonth.
2、金星Venus['vi:nəs]
Ifthesolarsystemhasanunderachiever,ithastobeVenus.
3、地球Earth[ə:θ]
Theearthrevolvesroundthesun.
4、火星Mars[ma:s]
Theyfoundthatinsome,MarsandVenuscollidedwiththeEarth.
5、木星Jupiter['dЗu:pitə]
HowmanymoonshastheplanetJupiter?
6、土星Saturn['sætə(:)n]
Saturnismysurroundings.
7、天王星Uranus['ju:ərənəs]
Butnotwithstandingallnicetyofcalculations,therealcourseofUran
uswouldnotatallagreewiththeonecomputed.
2
8、海王星Neptune['neptju:n]
TheplanetwaseventuallynamedNeptune,aftertheRomangodof
thesea.
9、冥王星PLUTO[ˈplu:təu]
ShouldPlutobeaplanet?
◇九大行星（SolarSystem）是太阳系的内行星，按照离太阳的距离从近到远，它们依次为
水星、金星、地球、火星、木星、土星、天王星、海王星、冥王星。
◇2006年8月24日下午，在第26届国际天文联会通过第5号决议，由天文学家以投票正
式将冥王星划为矮行星，自行星之列中除名。
◇八大行星自转方向多数也和公转方向一致，只有金星和天王星两个例外，金星自转方向与
公转方向相反，而天王星是在轨道上横滚的。
◆例文：
Oursolarsystemconsistsofthesun,nineplanets(andtheirmoons),anasteroidbelt,
isthecenterofoursolarsystem;theplanets,their
moons,theasteroids,comets,andotherrocksandgasallorbitthesun.
Thenineplanetsthatorbitthesunare(inorderfromthesun):Mercury,Venus,Earth,
Mars,Jupiter,Saturn,Uranus,Neptune,fasteroids(minorplanetsmadeof
rockandmetal)bjectsallorbitthesuninroughly
circularorbitsthatlieinthesameplane,theecliptic(Plutoisanexception;ithasanelliptical
orbittiltedover17°fromtheecliptic).
Easywaystoremembertheorderoftheplanetsarethemnemonics:"MyVeryExcellent
MotherJustSentUsNinePizzas"and"MyVeryEasyMethodJustSimplifiesUsNaming
Planets"Thefirstletterofeachofthesewordsrepresentsaplanet-inthecorrectorder.
llowedbySaturn,Uranus,Neptune,Earth,Venus,Mars,
Mercury,andfinally,rissobigthatalltheotherplanetscouldfitinsideit.
erPlanets
Theinnerplanets(thoseplanetsthatorbitclosetothesun)arequitedifferentfromthe
outerplanets(thoseplanetsthatorbitfarfromthesun).
Theinnerplanetsare:Mercury,Venus,Earth,erelativelysmall,
composedmostlyofrock,andhavefewornomoons.
Theouterplanetsinclude:Jupiter,Saturn,Uranus,Neptune,emostly
huge,mostlygaseous,ringed,andhavemanymoons(again,theexceptionisPluto,whichis
small,rocky,andhasonelargemoonplustwotinyones).
TemperaturesonthePlanets
Generally,thefartherfromtheSun,encesoccurwhenthe
greenhouseeffectwarmsaplanet(likeVenus)surroundedbyathickatmosphere.
Theouter,gaseousplanetsaremuchlessdensethantheinner,rockyplanets.
2
istheleastdenseplanet;itwouldfloatonwater.
TheMassofthePlanets
Jupiterisbyfarthemostmassiveplanet;,Neptune,Earth,Venus,
Mars,andPlutoareordersofmagnitudelessmassive.
GravitationalForcesonthePlanets
Theplagh
Saturn,Uranus,andNeptunearealsoverymassiveplanets,theirgravitationalforcesareabout
becausethegravitationalforceaplanetexertsuponanobjectat
theplanet'ssurfaceisproportionaltoitsmassandtotheinverseoftheplanet'sradiussquared.
ADayonEachofthePlanets
Adayisthelengthoftimethatittakesaplanettorotateonitsaxis(360°).Adayon
Earthtakesalmost24hours.
TheplanetwiththelongestdayisVenus;adayonVenustakes243Earthdays.(Aday
onVenusislongerthanitsyear;ayearonVenustakesonly224.7Earthdays).
TheplanetwiththeshortestdayisJupiter;adayonJupiteronlytakes9.8Earthhours!bai
WhenyouobserveJupiterfromEarth,youcanseesomeofitsfeatureschange.
TheAverageOrbitalSpeedofthePlanets
AstheplanetsorbittheSun,anetspeedsupwhen
itisnearertheSunandtravelsmoreslowlywhenitisfarfromtheSun(thisisKepler'sSecond
LawofPlanetaryMotion).