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From: psuvm%cjc@psuvax1.UUCP
Newsgroups: net.games.trivia
Subject: 
Message-ID: <893@psuvm.UUCP>
Date: Fri, 15-Jun-84 11:02:58 EDT
Article-I.D.: psuvm.893
Posted: Fri Jun 15 11:02:58 1984
Date-Received: Tue, 10-Jul-84 03:42:02 EDT
Lines: 19


    Agreed, there certainly is. For those who have difficulty
 visualizing the difference, ask a friend to help and try
 this experiment:  put an object in the center of a clear space
 with a large unmoving object (eg wall or building) nearby. Have
 friend move in a circle around the central object while always
 facing the object. You watch.  Then have friend move around the
 central object while always facing the nearby wall. Again you watch.
 I think you will see the difference. Both ways, friend is "orbiting"
 the central object; the first way he is also "rotating" slowly,
 the second way he is not "rotating".

     All authorities I have ever come across agree that the moon
 rotates once per revolution. If it did not then we on the earth
 would see all its sides once in each revolution. Its equator is
 approximately parallel to its orbital plane, its axis is
 perpendicular to both.

 C Clark  (cjc@psuvm - BITNET)