From: utzoo!decvax!cca!Arpanet.Guest@CMU-10A@sri-unix Newsgroups: net.space Title: Gravitational attraction and shifts Article-I.D.: sri-unix.2342 Posted: Fri Jul 30 08:21:43 1982 Received: Sat Jul 31 02:57:10 1982 Concerning the question of objects A and B, and the time it takes B to realise that A is gone, consider the following (lightly though!) Given that recently (50+ years) we have compiled some accurate astronomical data, does it not follow that we could take a known event of stellar proportions such as a nova or supernova and track it out to it's corresponding actions on the red/blue shift of a nearby star and thus measure the time delay? Since the distance to nova A is known, and the distance to star B is known, and thus the distance between them, the earth-object times are known and thus of no importance, and the object-object time becomes the control. If the change is very slight, which is very likely, do we have a means of accurate measurement? Would the space telescope provide the nessecary level of discretion? This is my first attempt at net communication, and I can only hope that somehow it will get through. Greg Maples n900gs0t@cmua gmm@mit-mc,ai