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    Re: automatic celestial navigation
    From: Peter Fogg
    Date: 2007 Dec 7, 19:56 +1100

    Gary writes:
    O.K. but there are only  limited periods during the day when satellites
    are visible, shortly before sunrise and  shortly after sunset, say about
    an hour each. During sunlight you can't see them against the bright sky
    (or the stars either) and after the sun is well down the satellite is in
    the shadow of the earth and is not illuminated.

    What you write makes sense, Gary, but in practice they can be seen well after sunset.  I've often seen these little bright points determinedly ploughing their way across the night sky - well after what should be my bedtime.

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