Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.2 9/18/84; site lsuc.UUCP
Path: utzoo!utcs!lsuc!msb
From: msb@lsuc.UUCP (Mark Brader)
Newsgroups: net.space,net.astro
Subject: Re: Tropics
Message-ID: <738@lsuc.UUCP>
Date: Mon, 29-Jul-85 19:58:30 EDT
Article-I.D.: lsuc.738
Posted: Mon Jul 29 19:58:30 1985
Date-Received: Mon, 29-Jul-85 21:23:10 EDT
References: <2803@mordor.UUCP>
Reply-To: msb@lsuc.UUCP (Mark Brader)
Organization: Law Society of Upper Canada, Toronto
Lines: 19
Xref: utcs net.space:3814 net.astro:832
Summary: Reposted from net.space as cross-posting to net.astro

This item entered net.space from the Arpa side.  On Usenet it obviously
belongs in net.astro.  I'm reposting it as a cross-posting so that followups
will go both to Usenet net.astro types and to the Arpans who originated it.

Reposted by Mark Brader

> From: Houser@MIT-MULTICS.ARPA
> 
> 
>           A book I was reading recently mentioned  that  over  time  the
> angle  of  the plane of the ecliptic changes.  The consequence is that
> the latitude of the tropics also move.  While this  makes  sense,  the
> book  also  stated that there is no formula which describes the motion
> over  time.  Is  this  really  true?  The  context  was  that  certain
> archeological  sites  are  solstice  oriented  and could be accurately
> dated if it was known in what year a Tropic was at  X  latitude.  Just
> curious.
> 
>                                         jim@tycho