nsTeam1RO, nsTeam1RW, nsTeam1_talkRO, nsTeam1_talkRW
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mLine 1:
Line 1: − 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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[[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 point of the celestial sphere that is directly opposite the zenith and vertically downward from the observer.''
''The point of the celestial sphere that is directly opposite the zenith and vertically downward from the observer.''