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1、XXX201X.X.XQuestionWhatarethenamesoftheeightplanetsofthesolarsysterm?Mercury水星Venus金星Earth地球Mars火星Jupiter木星Saturn土星Uranus天王星Neptune海王星MarsMarsisthefourthplanetfromtheSunintheSolarSystem.MarsisnamedfortheRomangodofwar,presumablybecauseofitsdistinctlyreddishcolor.MarsMarsEquatorialradius：3397
2、.2kmQuality：6.4219×10^23kgEquatorialradius：6372.8kmQuality：5.98×10^24kgMars'diameterisonlyabouthalfanditsmassaboutone-tenththeEarth's.Marshaspolaricecapsandcloudsinitsatmosphere,seasonalweatherpatterns,volcanoes,canyonsandotherrecognizablefeatures.However,conditionsonMarsvarywildlyfromwhatw
3、eknowonourownplanet.MarsVolcanoonMarsSpringofMarsLifeonMars?AmongourdiscoveriesaboutMars,onestandsoutaboveallothers:thepossiblepresenceofliquidwateronMars,eitherinitsancientpastorpreservedinthesubsurfacetoday.WateriskeybecausealmosteverywherewefindwateronEarth,wefindlife.Picturesofchannelsp
4、robablycarvedbyrunningwateronMarsLifeonMars?ColourviewofcraterwithwatericeMarsExploration“Spirit”Marsprobe（勇氣號）TimeofLaunch:2003.6.10TimeofLanding:2004.1.4“Opportunity”Marsprobe（機(jī)遇號）TimeofLaunch:2003.7.7TimeofLanding:2004.1.25NASA：美國宇航局MarsExploration“Curiosity”Marsprobe（好奇號）TimeofLaunch:20
5、11.11.26PlannedTimeofLanding:2012.8ProtecttheEarthTHANKSTHANKS
