The Cosmos on a Shoestring
内容简介
In the 1970s and 1980s, major research spacecraft cost more than 1 billion dollars, and took more than a decade to develop. However, innovations in management and technology have allowed spacecraft...
In the 1970s and 1980s, major research spacecraft cost more than 1 billion dollars, and took more than a decade to develop. However, innovations in management and technology have allowed spacecraft...
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