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1、2010:OdysseyTwoArthurC.ClarkeDedicated,withrespectfuladmiration,totwogreatRussians,bothdepictedherein:GeneralAlexeiLeonov-Cosmonaut,HerooftheSovietUnion,ArtistandAcademicianAndreiSakharov-Scientist,NobelLaureate,Humanist.Author'sNoteThenovel2001:ASpaceOdysseywaswrittenduringtheyears1964
2、-8andwaspublishedinJuly1968,shortlyafterreleaseofthemovie.AsIhavedescribedinTheLostWorldsof2001,bothprojectsproceededsimultaneously,withfeedbackineachdirection.ThusIoftenhadthestrangeexperienceofrevisingthemanuscriptafterviewingrushesbaseduponanearlierversionofthestory-astimulating,butr
3、atherexpensive,wayofwritinganovel.Asaresult,thereisamuchcloserparallelbetweenbookandmoviethanisusuallythecase,buttherearealsomajordifferences.Inthenovel,thedestinationofthespaceshipDiscoverywasIapetus(orJapetus),mostenigmaticofSaturn'smanymoons.TheSaturniansystemwasreachedviaJupiter:Dis
4、coverymadeacloseapproachtothegiantplanet,usingitsenormousgravitationalfieldtoproduceaPage1'slingshot'effectandtoaccelerateitalongthesecondlapofitsjourney.ExactlythesamemanoeuvrewasusedbytheVoyagerspaceprobesin1979,whentheymadethefirstdetailedreconnaissanceoftheoutergiants.Inthemovie,how
5、ever,StanleyKubrickwiselyavoidedconfusionbysettingthethirdconfrontationbetweenManandMonolithamongthemoonsofJupiter.Saturnwasdroppedfromthescriptentirely,thoughDouglasTrumbulllaterusedtheexpertisehehadacquiredtofilmtheringedplanetinhisownproduction,SilentRunning.Noonecouldhaveimagined,ba
6、ckinthemid-sixties,thattheexplorationofthemoonsofJupiterlay,notinthenextcentury,butonlyfifteenyearsahead.Norhadanyonedreamedofthewondersthatwouldbefoundthere-althoughwecanbequitecertainthatthediscoveriesofthetwinVoyagerswillonedaybesurpassedbyevenmoreunexpectedfinds.When2001waswritten,I
7、o,Europa,Ganymede,andCallistoweremerepinpointsoflightineventhemostpowerfultelescope;nowtheyareworlds,eachunique,andoneofthem-Io-isthemostvolcanicallyactivebodyintheSolarSystem.Yet,allthingsconsidered,bothmovieandbookstandupquitewellinthelightofthesediscoveries,anditisfascinatin
