Article View: sci.physics
Article #4119Re: Expansion
From: Benjamin Weiner
Date: Tue, 29 Sep 1992 20:54
Date: Tue, 29 Sep 1992 20:54
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ynecgan@cid.aes.doe.CA writes: >Now, if space itself is indeed expanding, and if it is happening at all >scales, ... It's not. You should read the other responses to your previous question. Briefly, the Hubble-Law expanding-space solution assumes a homogeneous universe, so it's only valid in a region which is approximately homogeneous, and the [solar system/galaxy/hydrogen atom/etc] is locally denser; space is not homogeneous on these scales. I think a usual rule of thumb is that if a system is [in the Newtonian gravitational approximation] gravitationally bound, it's not correct to apply the simple expansion-of-space rule to it.
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Path: arc1-ca.pugleaf.net!sparky!uunet!dziuxsolim.rutgers.edu!ruhets.rutgers.edu!bweiner From: bweiner@ruhets.rutgers.edu (Benjamin Weiner) Newsgroups: sci.physics Subject: Re: Expansion Message-ID: <Sep.29.16.54.08.1992.28530@ruhets.rutgers.edu> Date: 29 Sep 92 20:54:08 GMT References: <1992Sep29.040437.6678@cid.aes.doe.CA> Organization: Rutgers Univ., New Brunswick, N.J. Lines: 13