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本书主要包括三方面内容，第一类是诸如『卫星最后都是什么归宿？』这样的科普故事；第二类是航天爱好者感兴趣的一些有趣的工程问题，例如航天器轨道是如何设计和测定的？第三类是探索更远的宇宙空间需要解决的一些问题，比如为什么深空探测地面上要那么大的天线？
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