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    Re: De Lurk
    From: Peter Fogg
    Date: 2003 Feb 14, 07:34 +1100

    Brooke Clarke wrote:
    
    >  "Method for Space Navigation"  depends on a hemisphere with star fields and a sidereal
    > clock.  By matching the star field around the Earth you can tell where you are over the Earth.
    
    While in earth orbit I had imagined that Declination and Sidereal Hour Angle 
    and Distance from Earth could form the 3 axis for a 3 dimensional fix. But 
    what are the references
    once you leave the earth behind? I guess the star field remains a (relative) 
    constant, reference to the earth or the sun would be confusing because of 
    their movement?
    
    
    

       
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