Onaclearnight，themoonshinesbrightlyoverhead。Youmightthinkthatthemoongivesofflight， butitdoesnot。Lssurface。Sometimesthemoonlookslikealargeballsteadyinthesky。Othertimesitlookslikeatinysliver。Myths，orlegends，weremadeupbyearlypeopletoexplainwhythemoonchangesshape。TheearlypeopleofGreenlandthoughtthesungoddesswaschasingherbrother，themoongod，acrossthesky。GreenlandisanislandinNorthAmerica。Themoongodransomuchthatheforgottoeat，soasdayspassed，hebecamethinner。Finally，themoongodhadtostopandeat。Hegotbigger，andthechasebeganalloveragain。Todaypeopleunderstandwhytheshapeofthemoonchanges。Thechangesintheshapeofthemoonarecausedbythewaythemoonmovesinspace。Themoonmovesintwoways。Itrotates，orspinsaroundlikeatop。Ittakesthemoonabouttwentyninedaystorotateonce。Italsotravelsinapatharoundtheearthcalledanorbit。Thedifferentshapesofthemoonarecalledphases。Thisiswhatthephasesofthemoonlooklike： full waxinggibbous halfmoon waning waxing Thephasesofthemooninorderare： full， waninggibbous， halfmoon， crescent， newmoon， waxingcrescent， halfmoon， waxinggibbous， andfull。 gibbous crescent halfmoon new crescent Themoontakesabouttwentyninedaystoorbitaroundtheearth。Thesunalwayslightsuphalfofthemoon。Wedonotalwaysseethelituphalffromtheearth。Whenyouseeallthelituphalfofthemoon，themoonappearstobeafullcircle。Thisiscalledthefullmoon。Asthemoontravelsaroundtheearth，weseelessandlessofthelitpart。Thisiscalledthewaningmoon。Soonthelituppartofthemoondisappearsfromsight。Thisiscalledthenewmoon。Thenthemoonstartstolooklitupagain，andthelitpartthatyouseegetsbiggereachday。Thisiscalledthewaxingmoon。Ittakesabouttwentyninedaysforallthephases。Tsthesameamountoftimeittakesforthemoontomakeone triparoundtheearth。Startinginthe1950s，spacecraftweresenttostudythemoon。Thespacecraftorbitedthemoon。Inthisway，scientistslearnedmoreandmoreaboutthemoon。Then，onJuly20，1969，thefirstspacecraftcarryingastronautsfromtheearthactuallylandedonthemoon！Pssurfaceforthefirsttimeever。Itwasontelevision！ Theastronautssentthepicturesofthemoonbacktotheearth。Theastronautsbroughtmoonrocksbacktotheearth。Fromtherocks，scientistshavelearnedalotaboutthemoon。Therockswereevidencethatscientistscouldstudytofindouthowthemoonmighthavebeenformed。Scientiststhinkthemoonmightoncehavebeenpartoftheearth。Theythinkalargeobjectfromspacehittheearthmillionsofyearsago。Thedustandashesfromtheearthwentintospaceandformedthemoon。Peoplehavelearnedalotaboutthemoonsinceearlytimes！ 修改后： Onaclearnight，themoonshinesbrightlyoverhead。Youmightthinkthatthemoongivesofflight，butitdoesnot。Lssurface。Sometimesthemoonlookslikealargeballinthesky。Othertimesitlookslikeatinysliver。 Myths，orlegends，weremadeupbyearlypeopletoexplainwhythemoonchangesshape。TheearlypeopleofGreenlandwhichisanislandinNorthAmericathoughtthesungoddesswaschasingherbrother，themoongod，acrossthesky。Themoongodransomuchthatheforgottoeat，soasdayspassed，hebecamethinner。Finally，themoongodhadtostopandeat。Hegotbigger，andthechasebeganalloveragain。 Todaypeopleunderstandwhytheshapeofthemoonchanges。Thechangesintheshapeofthemoonarecausedbythewaythemoonmovesinspace。Themoonmovesintwoways。Itrotates，orspinsaroundlikeatop。Ittakesthemoonabouttwentyninedaystorotateonce。Italsotravelsinapatharoundtheearthcalledanorbit。Thedifferentshapesofthemoonarecalledphases。Thisiswhatthephasesofthemoonlooklike：full，waxinggibbous，halfmoon，waning，waxing。Thephasesofthemooninorderare：full，waninggibbous，halfmoon，crescent，newmoon，waxingcrescent，halfmoon，waxinggibbous，andfull。 Themoontakesabouttwentyninedaystoorbitaroundtheearth。Thesunalwayslightsuphalfofthemoon。Wedonotalwaysseethelituphalffromtheearth。Whenyouseeallthelituphalfofthemoon，themoonappearstobeafullcircle。Thisiscalledthefullmoon。Asthemoontravelsaroundtheearth，weseelessandlessofthelitpart。Thisiscalledthewaningmoon。Soonthelituppartofthemoondisappearsfromsight。Thisiscalledthenewmoon。Thenthemoonstartstolooklitupagain，andthelitpartthatyouseegetsbiggereachday。Thisiscalledthewaxingmoon。Ittakesabouttwentyninedaysforallthephases。Tsthesameamountoftimeittakesforthemoontomakeonetriparoundtheearth。 Startinginthe1950s，spacecraftweresenttostudythemoon。Thespacecraftorbitedthemoon。Inthisway，scientistslearnedmoreandmoreaboutthemoon。Then，onJuly20，1969，thefirstspacecraftcarryingastronautsfromtheearthactuallylandedonthemoon！Pssurfaceforthefirsttimeever。Itwasontelevision！ Theastronautssentthepicturesofthemoonbacktotheearth。Theastronautsbroughtmoonrocksbacktotheearth。Fromtherocks，scientistshavelearnedalotaboutthemoon。Therockswereevidencethatscientistscouldstudytofindouthowthemoonmighthavebeenformed。Scientiststhinkthemoonmightoncehavebeenpartoftheearth。Theythinkalargeobjectfromspacehittheearthmillionsofyearsago。Thedustandashesfromtheearthwentintospaceandformedthemoon。Peoplehavelearnedalotaboutthemoonsinceearlytimes！ 初一：程锦升
我想竖起大拇指五年级作文关于元旦NewYearsDay四季的草作文二年级叙事作文快乐的一天为学杯C组走复兴路，圆中国梦灰姑娘的穿越（八）小徒弟大年三十掉牙风波作文300字描写我和我的朋友们的作文作文2篇在阳光下运动精品小学叙事作文400字三篇名人名言历史老师，谢谢您！！切莫踩中装修雷区！不然花钱都没办法补救！安装中央空调要多少钱安装中央空调价格介绍详解洗衣服造句用洗衣服造句大全伤春曲修容盘什么牌子的好？七款修容盘不仅仅只是修容哦！老人按摩哪些穴位可以预防老年痴呆青春励志文章400字有趣的数字小班教案构建肿瘤知识图谱体系，CSCOAI要突破肿瘤的全治疗周期有票青年是什么意思？有票青年意思是有人抢到了火车票要想生活过得去，身上总得带点绿，奔驰GLK30。。。