【英语翻译Ifyouaretravelingforwardsinatrain,surroundingobjectsoutsideappeartobemovingbackwards.Butthisisnotinfactthecase.Itisthetrainwhichismoving.Soitiswiththeearth.thesunappearstoriseintheeast,moveacrosst】

　　英语翻译

　　Ifyouaretravelingforwardsinatrain,surroundingobjectsoutsideappeartobemovingbackwards.Butthisisnotinfactthecase.Itisthetrainwhichismoving.Soitiswiththeearth.thesunappearstoriseintheeast,moveacrossthesky,andsetinthewest.inotherwordsthesunappearstotravelroundtheearth..infact,howeverthisisnotthecase.Itistheearthwhichiisrotatingonitsownaxis.therotationofthewarthonitsownaxiscausesthehangefromdaytonight,theearthalsotravelsroundthesunonafixedpath,knownasanorbit.Inadditiontotheearth,thereareeighrotherplanentsofdifferentsizes,allrotatingontheirownaxesandroundthesunintheirownfixedorbits,andwhicharwknownasthesolarsystem.Theplanetnearestthesunismercuryandthemostdistant,Pluto.theorbirsiftheearthandtheotherplanetsarenotperfectcircles,butellipses.theanglesandinanellipticalorbitcausesthechangeoftheseasons