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    Alternate Planets for Celestial Navigation
    From: Frank Reed
    Date: 2008 Feb 21, 06:23 -0500

    The Earth is nearly a sphere, but not quite. Celestial navigation, as
    commonly practiced, has no issues with the fact that the Earth isn't quite
    round. The flattening is only one part in about 300.
    
    But if the Earth were a cube, instead of a sphere?? Then celestial
    navigation wouldn't work at all --on every face of this imaginary
    cube-shaped planet, the altitudes of key stars would be constant. One could
    not determine position on a "cubic planet" by measuring the stars. So what
    "shape" and what "topology" makes celestial navigation on a planetary
    surface possible? On a sphere, it works; on a cube, it doesn't. Could you
    shoot the stars on Saturn's moon Hyperion, with its famously non-spherical
    shape? If celestial's possible on some spheroidal body, is there any
    downside to celestial navigation on a planet that's flattened at the poles?
    
    Just some food for thought...
    
     -FER
    
    
    
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