英语翻译Scientistshavealwayswantedtoknowmoreabouttheuniverse.Yearsagotheyknewmanythingsaboutthemoon.Theyknewhowbigitwasandhowfarawayitwasfromtheearth.Buttheywantedtoknowmoreaboutit.Theythoughtthebestwayi
英语翻译
Scientistshavealwayswantedtoknowmoreabouttheuniverse.Yearsagotheyknewmanythingsaboutthemoon.Theyknewhowbigitwasandhowfarawayitwasfromtheearth.Buttheywantedtoknowmoreaboutit.Theythoughtthebestwayistosendmentothemoon.Themoonisabout384000kilometersawayfromtheearth.Aplanecannotflytothemoonbecauseairreachesonly240kilometersawayfromtheearth.Butsomethingcanflyevenwhenthereisnoair.Thatisarocket.Howdoesarocketfly?Thereisgasintherocket.Whenthegasismadeveryhotinsidetherocket,itwillrushoutoftheendoftherocket,soitcanmaketherocketflyupintothesky.Rocketscanflyfarintospace.Rocketswithmeninthemhavebeentothemoon.Severalrocketswithoutmeninthemhaveflowntoanotherplanetmuchfartherawaythanthemoon.Onedayrocketswillbeabletogotoanyplace.