关于Hubble的知识
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The Hubble一只望远镜的革命英语美文
TheHubble一只望远镜的革命Whenmostpeoplethinkofspace,whatcometomindarenameslikeJohnGlennandNeilArmstrong.Whenscientiststhinkaboutspace,thenamethatcomestomindisHubble,aspacetelescopewesentonatwenty-year...
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Trouble with the Hubble美文欣赏
TroublewiththeHubble哈勃望远镜的困境TheHubbletelescopewaslaunchedintospacebyNASAonApril20,1990atacostofoverabilliondollars.RightfromthestarttherewastroublewiththeHubble.Thepicturesitsentuswereverydisa...