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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Lunar Distance in Wikipedia
From: George Huxtable
Date: 2007 Jul 22, 22:18 +0100
From: George Huxtable
Date: 2007 Jul 22, 22:18 +0100
I've just been delving into "Lunar Distance (Navigation)" in Wikipedia, and can quote this little gem- "[edit] Theory If there are two people, one at Greenwich and one 15 degrees West, the time by the sun will be one hour later at 15 degrees West. So, if the person observes the position of the moon at Greenwich at noon and another person observes the moon 15 degrees west of Greenwich at their locally determined noon, then due to the one hour difference, although the sun is at its zenith, the moon would have moved approximately its own diameter across the sky." ========================= Just checking that I'm not making a silly error here. At the same moment, when the time by the Sun is noon for the observer at Greenwich, then for the observer at 15 degrees West, won't the Sun still be climbing up the sky? And so, won't his time by the Sun at that moment be 11 am, one hour earlier, rather than one hour later? Looking at it another way, however, when it's noon for the observer at Greenwich, it won't be noon for the observer at 15 degrees West until an hour later. I thought I understood the matter, but now I am thoroughly confused. What is the fellow trying to tell us? I wonder who wrote it? George. contact George Huxtable at george@huxtable.u-net.com or at +44 1865 820222 (from UK, 01865 820222) or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---