【预订】John Houbolt 9781612496573 国外库房发货,通常付款后3-5周到货!
Product Details 基本信息 ISBN-13 书号 9781612496573 Author 作者 William F. Causey Format 版本 平装-胶订 Pages Number 页数 374页 Publisher 出版社 Purdue University Press Publication Date 出版日期 2022-03-30 Product Dimensions 商品尺寸 15.24 x 1.96 x 22.86 cm Shipping Weight 商品重量 498.95 g Language 语种 其它(含多语) Book Contents 内容简介 In May 1961, President Kennedy announced that the United States would attempt to land a man on the moon and return him safely to the earth before the end of that decade. Yet NASA did not have a specific plan for how to accomplish that goal. Over the next fourteen months, NASA vigorously debated several options. At first the consensus was to send one big rocket with several astronauts to the moon, land and explore, and then take off and return the astronauts to earth in the same vehicle. Another idea involved launching several smaller Saturn
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