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time diagram |
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time diagram [′tīm ‚dīยทə‚gram] (astronomy) A diagram in which the celestial equator appears as a circle, and celestial meridians and hour circles as radial lines; used to facilitate solution of time problems and other problems involving arcs of the celestial equator or angles at the pole, by indicating relations between various quantities involved; conventionally, the relationships are given as viewed from a point over the South Pole, in a westward direction or counterclockwise. Also known as diagram on the plane of the celestial equator; diagram on the plane of the equinoctial. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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