We are gradually getting to know more and more about the ____ in which Earth is situated, the Milky way. Many people have talked about the possibility of forming ____ of forming people on other planets, but the problem is the atmosphere of most planets lack enough ____ for people to be able to breathe. Astronauts have lived in ____ that ____ the Earth for some time now but another idea is to build a ____ on the ____ of another planet. This could be used for people as a ____ to live in, but the other challenge is building a ____ capable of taking people there (not to mention the task of trying to stay alive once it's landed.)

L3 Unit 10 Revision

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