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    Re: Halley's lunar knowledge.
    From: Michael Daly
    Date: 2007 Nov 25, 23:20 -0500

    George Huxtable wrote:
    > and for some reason he pointed to an anonymous contemporary review of
    > Halley's Southern-stars catalogue. I don't understand its relevance, but am
    > grateful for that mention, as I had not seen it before.
    
    You said you hadn't read Phil. Trans.vol. 12, no. 141 (1678), 1032-4.
    Well, that's it.  An anonymous review.
    
    
    > Are those what Daly appears now to dismiss as "raw data"?
    
    Of course they are raw data.  Halley did not go into his friendly,
    neighbourhood navigator's supply shop and buy a printed copy of the
    lunar information telling him when a particular star would be occulted
    _in_the_future_ by the moon.  He had data that specified the position
    information on the moon - in the past.  That's raw data.  He has to use
    it along with a model of lunar motion to produce the information he needs.
    
    
    Mike
    
    
    
    
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