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Noon |
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noon [nün]
(astronomy) The instant at which a time reference is over the upper branch of the reference meridian. Noon the moment at which, for a given point on earth, the center of the sun (the true sun or the mean sun) is in the upper culmination. The apparent noon corresponds to a meridian transit by the true sun, while mean noon corresponds to a transit by the mean sun. The time at which noon occurs depends on the geographic longitude. Noon begins one hour later for every 15° of longitude to the west. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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