Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site ukma.UUCP Path: utzoo!watmath!clyde!cbosgd!hasmed!qusavx!ukma!sean From: sean@ukma.UUCP (Sean Casey) Newsgroups: net.physics Subject: Re: Re: "big bang" a big bust? Message-ID: <384@ukma.UUCP> Date: Thu, 13-Dec-84 18:15:24 EST Article-I.D.: ukma.384 Posted: Thu Dec 13 18:15:24 1984 Date-Received: Sat, 15-Dec-84 00:16:34 EST References: <85@decwrl.UUCP> <10800012@uiucdcsb.UUCP>, <162@talcott.UUCP> Organization: Univ. of KY Mathematical Sciences Lines: 32 - Can gravity propagate faster than c? The question I would ask is: Does gravity propagate? I think it depends on what you consider gravity to be. Is it a wave phenomena? It is a warpage of space? I seriously doubt we'll find the answers (facts, not theory) until we can measure it qualitatively. I once read a SF story about some astronauts that found an alien transmitter on Mars. It had a "microscopically small black hole" that was induced to vibrate by magnetic waves. According to the story, the gravitic disturbance created affected the entire space fabric of the universe simultaneously. One might ask whether the "fabric of space" has the same same properties as a piece of cloth, that is, if you pull on one edge, does the disturbance propagate or does it affect the entire sheet at once? One way that seems interesting would be to annhilate a certain weight of matter and measure the gravitic disturbance. The dis- tance of space could be used to create a delay that would be measurable. Then you'd know the speed of gravity. Does anyone know of any experiments, domestic or cosmic, that have in some way determined "the speed of gravity"? Sean Casey - Curiosity is the beginning of Wisdom