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Space Travel and Exploration

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In order for your assertion to be true, one half the Earth would not be able to see the moon without traveling to the other half. Since we know that that's not the case, and we know that the moon does not rotate, a permanent dark side is an impossibi

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Space

The vast plains of Mars may be the most promising place beyond Earth for human colonization, but is it enough for a one-way trip to the Red Planet? A manned one-way mission to Mars would not only make economical sense, but mark the beginning of long-