Sorry for asking a question and then answering it ... but this question was recently posted here, and I don't think anybody had the correct answer:
http://answers.yahoo.com/question/index;_ylt=Av1kU2Yg39OoMXVYoQGgszYezKIX?qid=20070104212816AAclxIj
People all correctly pointed out that the Apollo missions went to the moon. But the comment was that since the moon orbited the earth, that the Apollo missions had technically never left the earth's orbit. I disagree.
It is unclear whether being in orbit around the moon is in fact also being in orbit around the earth. But I'm not talking about that.
But what is clear to me is that *while in transit* to the moon, the Apollo spacecraft was NOT in earth's orbit by any definition of the word "orbit." It had achieved escape velocity and had escaped the earth's orbit. Had the moon not been there to *decelerate* the spacecraft (and capture it in a lunar orbit), it was gone.
Anyone disagree? If so, why?
2007-01-07
11:56:39
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5 answers
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asked by
secretsauce
7