Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.1 exptools 1/6/84; site ihuxp.UUCP
Path: utzoo!watmath!clyde!burl!ulysses!mhuxj!ihnp4!ihuxp!fcm
From: fcm@ihuxp.UUCP (F.C. McAtee)
Newsgroups: net.astro
Subject: Measurement of Light Years and Distance
Message-ID: <872@ihuxp.UUCP>
Date: Thu, 18-Oct-84 13:10:16 EDT
Article-I.D.: ihuxp.872
Posted: Thu Oct 18 13:10:16 1984
Date-Received: Sun, 21-Oct-84 09:29:29 EDT
Organization: AT&T Bell Labs, Naperville, IL
Lines: 24

>>Newsgroups: net.astro
>>Subject: StarDate: October 16: A Supernova in Andromeda
>>
>>Scientists at the time believed that S Andromedae lay only a few
>>THOUSAND light-years from Earth......
>>
>>Since Andromeda was now known to be MILLIONS of
>>light-years away.....
>>


Can anyone tell me how the distance in light years is measured? 
How do we know how far something is? Does the spectrum shift
of light have something to do with it?

As you can see, I am not very knowledgeable on the subject.
-- 




					F. C. McAtee
					AT&T Consumer Products, Inc.
					...ihnp4!ihuxp!fcm