Re: [Phys-l] Hubble Law

["Jeffrey Schnick" <JSchnick@Anselm.Edu>]

> -----Original Message-----
> From: phys-l-bounces@carnot.physics.buffalo.edu 
> [mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf 
> Of Rick Tarara
> Sent: Thursday, January 18, 2007 11:35 AM
> Subject: Re: [Phys-l] Hubble Law
>
> What I would like further clarification on, is the limits of 
> this expansion. 
> I don't think we consider atoms to be expanding or even 
> molecules although both are mostly 'space'.  If that's right 
> (and I could be wrong there) then objects wouldn't expand 
> (well I have with time but that's another story)--people, 
> houses, planets, and stars wouldn't expand (or do they?) This 
> would imply (to me) that nuclear and electrical forces can 
> negate the local expansion--but at what scale and for what 
> strength forces/fields? 
> Probably need the General Relativity experts and/or 
> cosmologists to answer. 
> A quick trip to Google didn't prove very useful.
>
> Rick

This reference
http://www.av8n.com/physics/expansion-of-the-universe.htm
indicates that it is galaxies that are moving away from each other while
maintaining their own size.  The relevant quote is: "On the other hand,
atoms, rulers, stars, and even galaxies are sufficiently firmly bound
that they can resist this stress, so they do not expand."  The author is
John Denker.
Jeff Schnick