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Drumhead Tension

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Posted by Richard Ruquist on January 13, 2006 02:36:08 UTC

Drums vibrate because they are in tension. That is there is a restoring force. But I would think that massive bodies and Dark Matter, once deflected gravitationally by a smaller galaxy or two, would just coast and continue separating over time. If our galaxy is indeed vibrating like a drum, then Dark Matter must be subject to a greater force than gravity. Perhaps the UCB astronomers are just being poetical.

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