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    Re: celestial navigation on Gemini and Apollo flights
    From: Marcel Tschudin
    Date: 2008 Sep 17, 01:30 +0300

    Collins was a very fast Magellan. As a member in this list without any
    practical navigation experience I just try to imagine how fast he had
    to do his observations. The duration of an orbit has probably been
    around 2 hours; in this case the sky objects were moving more than 10
    times faster than in traditional navigation. Could it be that despite
    the high inaccuracy from refraction and extinction, the observation of
    a setting star was easier to do than an observation of a star
    somewhere in the sky?
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