Return-path: X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson Received: from beak.andrew.cmu.edu via trymail for +dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl@andrew.cmu.edu (->+dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl) (->ota+space.digests) ID ; Thu, 18 Oct 1990 01:27:21 -0400 (EDT) Message-ID: <4b7HoNO00VcJEU7U4z@andrew.cmu.edu> Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Thu, 18 Oct 1990 01:26:50 -0400 (EDT) Subject: SPACE Digest V12 #463 SPACE Digest Volume 12 : Issue 463 Today's Topics: Venus/Magellan, poles Administrivia: Submissions to the SPACE Digest/sci.space should be mailed to space+@andrew.cmu.edu. Other mail, esp. [un]subscription notices, should be sent to space-request+@andrew.cmu.edu, or, if urgent, to tm2b+@andrew.cmu.edu ---------------------------------------------------------------------- Date: Wed, 17 Oct 90 11:39:02 EDT From: Jeffrey R Kell Subject: Venus/Magellan, poles I read all the (various) definitions of "poles" and longitude direction, spin, etc., but to ask a possibly silly question, HOW do you determine where a longitude grid BEGINS? Find Greenwich, Venus? ( ;-) ) One of the (more) unbelievable parts of "Close Encounters" (and others) was the use of our latitude/longitude co-ordinate system. While latitude can be inferred (or at least argued over as of late) what basis (if any) is there for longitude? +-----------------------------------+----------------------------------+ | Jeffrey R Kell, Dir Tech Services | UTC Postmaster/Listserv co-ord. | | Admin Computing, 117 Hunter Hall |Bitnet: JEFF@UTCVM.BITNET | | Univ of Tennessee at Chattanooga |JEFF%UTCVM.BITNET@CUNYVM.CUNY.EDU | | Chattanooga, TN 37403 | Bell: (615)-755-4551 | +-----------------------------------+----------------------------------+ ------------------------------ End of SPACE Digest V12 #463 *******************