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    Re: CN in a Planetarium?
    From: Renee Mattie
    Date: 2004 Mar 20, 20:59 -0500

    The planetarium is a great place to learn
    the constellations, but those little
    points of light on the ceiling are too close
    to you to do CelNav with your sextant.
    Try this out at home.  Take the height of your wall.
    Now back up a couple of feet and do it again.
    The wall fills a smaller angle in your sextant.
    You'll have the same problem in a planetarium,
    unless you have a way to mount the sextant firmly
    in a "proper" location, at the correct angle.
    Even the moon is far enough away from you that
    moving a couple of feet is not going to cause
    a big change in its height, as measured with
    your sextant.  Not so in a planetarium.

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