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