From: Tim Bates <tim@...>
Date: 2005-02-07T06:52:26+09:00
Subject: Re: [OT] Physics of black holes (Was: RubyConf '05)

Josef 'Jupp' Schugt wrote:
> Superluminal speed ist nothing that requires a hyperspace. The relative 
> speed of galaxies for example is known to exceed the speed of light.

No, it's not. You've forgotten your elementary relativity. If you have 
two galaxies on opposite sides of the universe (call them A and B) with 
an observer in between (called O) then from O's frame of reference the 
sum of the speeds of A and B might exceed c (the speed of light), 
although neither galaxy's individual speed can exceed c, BUT from A's 
frame of reference B's speed does not exceed c and vice versa.

If this sounds bizarre and impossible to you, you haven't studied physics.

Tim.

-- 
Tim Bates
tim@bates.id.au