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Author Topic:   How big is the Universe?
Briterican
Member (Idle past 3978 days)
Posts: 340
Joined: 05-29-2008


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Message 18 of 39 (532301)
10-22-2009 2:31 PM
Reply to: Message 3 by Dr Jack
10-16-2009 6:48 AM


Fade out
Mr Jack Writes
The expansion of the universe is not primarily due to movement, but to the expansion of space itself. This expansion is not limited by the speed of light.
A fascinating implication of this is that the more distant galaxies which would appear to be receding from us at a speed in excess of the speed of light would eventually fade from observation, and the logical extension of this is that there are presently galaxies that we cannot (nor will we ever) be able to see, because the light travelling from them cannot keep up with the expansion of space and will thus never reach us.

This message is a reply to:
 Message 3 by Dr Jack, posted 10-16-2009 6:48 AM Dr Jack has not replied

Replies to this message:
 Message 19 by cavediver, posted 10-22-2009 2:56 PM Briterican has not replied
 Message 20 by Perdition, posted 10-22-2009 2:59 PM Briterican has not replied

  
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