home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: sci.astro
- Path: sparky!uunet!usc!cs.utexas.edu!milano!rsb
- From: rsb@mcc.com (Richard S. Brice)
- Subject: Re: the moon
- Message-ID: <1992Aug17.144110.9725@mcc.com>
- Summary: how does moon know?
- Organization: MCC, Austin, TX
- References: <1992Aug16.094059.830@sfu.ca> <Bt3EsB.6q2@usenet.ucs.indiana.edu>
- Date: Mon, 17 Aug 1992 14:41:10 GMT
- Lines: 16
-
- In article <Bt3EsB.6q2@usenet.ucs.indiana.edu>, turner@bigbang.astro.indiana.edu (George Wm Turner) writes:
- >
- > anyways, this friction robs the earth of rotational energy and slows
- > the earth's spin; (the length of an earth day lengthens by about
- > 0.002 second per century.) but the total angular momentum of the
- > earth-moon system must be conserved causing the moon to move farther
- > out. to put it another way, since there is less angular momentum in a
- > slower spinning earth at the center, a way to get more angular
- > momentum is to move the mass of the moon farther away thus keeping
- > the total amount of angular momentum constant. (this theory of tidal
-
- How does the moon know that it's supposed to move further away from the
- earth just because the earth is slowing down?
-
- R. Brice
- MCC Corp
-