Difference between revisions of "Nadir"
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[[Image:CenitNadir.gif|right|250px]] | [[Image:CenitNadir.gif|right|250px]] | ||
The '''nadir''' is the point on [[Earth]] directly beneath a [[satellite]], the opposite of [[zenith]]. Compare with [[subsatellite point]]. <ref> [http://earthobservatory.nasa.gov/Library/glossary.php3?mode=all NASA Earth Observatory glossary] </ref> | The '''nadir''' is the point on [[Earth]] directly beneath a [[satellite]], the opposite of [[zenith]]. Compare with [[subsatellite point]]. <ref> [http://earthobservatory.nasa.gov/Library/glossary.php3?mode=all NASA Earth Observatory glossary] </ref> | ||
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'''Etymology:''' Middle English, from Middle French, from Arabic naḍhīr opposite | '''Etymology:''' Middle English, from Middle French, from Arabic naḍhīr opposite | ||
Revision as of 21:38, October 13, 2007
The nadir is the point on Earth directly beneath a satellite, the opposite of zenith. Compare with subsatellite point. [1]
Etymology: Middle English, from Middle French, from Arabic naḍhīr opposite Date: 15th century. [2]
References
- ↑ NASA Earth Observatory glossary
- ↑ Nadir Merriam-Webster Online Dictionary