Science Fair Project Encyclopedia
Nadir
In astronomy, the nadir is the, obviously invisible, point on the sky vertically downward, i.e., with an altitude of -90 degrees, or opposite to the zenith.
Nadir also means the lowest point eg: the nadir of their fortunes.
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details


