From: utzoo!decvax!duke!harpo!gdw Newsgroups: net.space Title: Re: re:supernovae & gravity waves - (nf) Article-I.D.: harpo.928 Posted: Fri Aug 6 16:32:01 1982 Received: Mon Aug 9 06:32:32 1982 #R:utzoo:-233800:harpo:11700001:000:290 harpo!gdw Aug 6 16:21:00 1982 I thought that distances were measured using "red shift", viz. the Doppler shift (toward longer wavelengths) of it's spectrum due to it's velocity away from Earth caused by the expanding universe. This velocity times the Hubble constant equals the distance of the star with good accuracy.