You’re right...but IIRC, with the speed, they can tell how far it is...something about the farther it is, the faster it appears to be moving away...it’s been almost 20 years since my ONE college astronomy class...
14 posted on 02/12/2008 2:38:34 PM PST by JRios1968
("If you go over a cliff with all flags flying, you are still going over a cliff" —Ronald Reagan)