orbits英文

30kg轨道与30kg轨道最小距离是0.3mm。轨道（英文：orbits）指用条形的钢材铺成的供火车、电车等行驶的路线。也可以是天体在宇宙间运行的路线。也叫轨迹。物体运动的路线，更多的是指有一定规则的，如原子内电子的运动和人造卫星的运行都有一定的轨道。行动应遵循的规则、程序或范围：生产已经走上轨道。轨道承受着多变化的垂直、横向、纵向的静荷载和动荷载，荷载从钢轨通过轨枕和道床传递到路基。通过力学理论，分析研究在各种荷载条件下，轨道各组成部分所产生的应力和应变，而确定其承载能力和稳定性。轨道力学分析轨道结构在机车车辆作用下的受力和变形，以及轨道结构病害对轨道破坏及列车运行的影响，为设计轨道结构、制定轨道管理标准提供依据。

SolarSystem,theSunandeverythingthatorbitstheSun,includingthenineplanetsandtheirsatellites;theasteroidsandcomets;andinterplanetarydustandgas.Thetermmayalsorefertoagroupofcelestialbodiesorbitinganotherstar(seeExtrasolarPlanets).Inthisarticle,solarsystemreferstothesystemthatincludesEarthandtheSun.SolarSystemThedimensionsofthesolarsystemarespecifiedintermsofthemeandistancefromEarthtotheSun,calledtheastronomicalunit(AU).OneAUis150millionkm(about93millionmi).Themostdistantknownplanet,Pluto,orbitsabout39AUfromtheSun.EstimatesfortheboundarywheretheSun’smagneticfieldendsandinterstellarspacebegins-calledtheheliopause-rangefrom86to100AU.Ninemajorplanetsarecurrentlyknown.Theyarecommonlydividedintotwogroups:theinnerplanets(Mercury,Venus,Earth,andMars)andtheouterplanets(Jupiter,Saturn,Uranus,andNeptune).Theinnerplanetsaresmallandarecomposedprimarilyofrockandiron.Theouterplanetsaremuchlargerandconsistmainlyofhydrogen,helium,andice.Plutodoesnotbelongtoeithergroup,andthereisanongoingdebateastowhetherPlutoshouldbecategorizedasamajorplanet.CharacteristicsofthePlanetsMercuryissurprisinglydense,apparentlybecauseithasanunusuallylargeironcore.Withonlyatransientatmosphere,Mercuryhasasurfacethatstillbearstherecordofbombardmentbyasteroidalbodiesearlyinitshistory.Venushasacarbondioxideatmosphere90timesthickerthanthatofEarth,causinganefficientgreenhouseeffectbywhichtheVenusianatmosphereisheated.Theresultingsurfacetemperatureisthehottestofanyplanet-about477°C(about890°F).MoonsoftheSolarSystemMoonsoftheSolarSystemAhostofminorworldscircletheplanetsofthesolarsystem.Severalofthesemoonsarelargerthanthesmallestplanets.Unmannedspacecrafthavephotographedmanyoftheseworldsatcloserange.EncartaEncyclopediaKathleenGreenFullSizeEarthistheonlyplanetknowntohaveabundantliquidwaterandlife.However,in2004astronomerswiththeNationalAeronauticsandSpaceAdministration’sMarsExplorationRovermissionconfirmedthatMarsoncehadliquidwateronitssurface.ScientistshadpreviouslyconcludedthatliquidwateronceexistedonMarsduetothenumeroussurfacefeaturesontheplanetthatresemblewatererosionfoundonEarth.Mars’scarbondioxideatmosphereisnowsothinthattheplanetisdryandcold,withpolarcapsoffrozenwaterandsolidcarbondioxide,ordryice.However,smalljetsofsubcrustalwatermaystilleruptonthesurfaceinsomeplaces.LargestNaturalPlanetarySatellitesJupiteristhelargestoftheplanets.Itshydrogenandheliumatmospherecontainspastel-coloredclouds,anditsimmensemagnetosphere,rings,andsatellitesmakeitaplanetarysystemuntoitself.OneofJupiter’slargestmoons,Io,hasvolcanoesthatproducethehottestsurfacetemperaturesinthesolarsystem.AtleastfourofJupiter’smoonshaveatmospheres,andatleastthreeshowevidencethattheycontainliquidorpartiallyfrozenwater.Jupiter’smoonEuropamayhaveaglobaloceanofliquidwaterbeneathitsicycrust.SaturnrivalsJupiter,withamuchmoreintricateringstructureandasimilarnumberofsatellites.OneofSaturn’smoons,Titan,hasanatmospherethickerthanthatofanyothersatelliteinthesolarsystem.UranusandNeptunearedeficientinhydrogencomparedwithJupiterandSaturn;Uranus,alsoringed,hasthedistinctionofrotatingat98°totheplaneofitsorbit.Plutoseemssimilartothelarger,icysatellitesofJupiterorSaturn.PlutoissodistantfromtheSunandsocoldthatmethanefreezesonitssurface.SeealsoPlanetaryScience.

翻译：The sun and the solar system by the gravitational effect of its operation objects around it constitute the celestial system. It includes the sun, eight planets and their satellites, asteroids, comets, meteoroids and interplanetary matter. Human beings living on Earth is a member of the solar system.Solar system where we are now the star system. By the sun, eight planets, 66 satellites, as well as numerous asteroids, comets and meteorites formed. Planet from the sun out of order: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. From the sun closer to Mercury, Venus, Earth and Mars is called terrestrial planets.Farther from the sun, Jupiter, Saturn, Uranus, Neptune called the Jovian planets。原文：太阳系是由太阳以及在其引力作用下围绕它运转的天体构成的天体系统。它包括太阳、八大行星及其卫星、小行星、彗星、流星体以及行星际物质。人类所居住的地球就是太阳系中的一员。太阳系就是我们现在所在的恒星系统。由太阳、8颗大行星，66颗卫星，以及无数的小行星、彗星及陨星组成的。行星由太阳起往外的顺序是：水星，金星、地球、火星、木星、土星、天王星、海王星。离太阳较近的水星、金星、地球及火星称为类地行星。离太阳较远的木星、土星、天王星、海王星称为类木行星。