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- Xref: sparky sci.astro:14305 sci.physics:23295
- Newsgroups: sci.astro,sci.physics
- Path: sparky!uunet!gatech!destroyer!ncar!noao!stsci!scivax!zellner
- From: zellner@stsci.edu
- Subject: Modelling the expanding universe
- Message-ID: <1993Jan22.131114.1@stsci.edu>
- Lines: 19
- Sender: news@stsci.edu
- Organization: Space Telescope Science Institute
- Distribution: na
- Date: Fri, 22 Jan 1993 18:11:14 GMT
-
- Tom Van Flandern writes:
-
- > If the galaxies themselves moved, that would require a center and an
- > edge to the big bang explosion. Then the universe would not look
- > everywhere the same, as the Friedmann postulates require.
-
- To me that seems a non-problem. To itself, each molecule in an expanding
- gas appears to be at the center, and all other molecules are systematically
- moving away from it with velocities that increase linearly with distance.
- Whether a "real" center exists or not is irrelevant, unless of course you
- can actually see to the edge of the gas. Our universe appears to be big
- enough that the "edge", if any, is outside our light horizon.
-
- Concerning the rest of this controversy, I think Ethan Vishniac settled all
- the dust in a later post. Whether the galaxies are moving apart, or space
- is expanding, is just a question of how you choose to describe it.
-
- Ben
-
-