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EvC Forum ⇒ Science Forums ⇒ Big Bang and Cosmology ⇒

Expansion of the Universe

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Author Topic:   Expansion of the Universe
cavediver
Member (Idle past 3674 days)
Posts: 4129
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Joined: 06-16-2005

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Message 14 of 31 (605443)
02-19-2011 6:19 PM 		Reply to: Message 13 by NoNukes
02-19-2011 5:40 PM

It isn't true at all. Assuming that the expansion is isotropic, then space between the pair of points expands at a rate proportional to the current separation of the pairs of points. The distance from us to the pair of points is not relevant.
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And actually it is, observationally, but opposite to what has been suggested. Distant pairs of objects will be observed to expand away from each other more slowly than similarly separated pairs that are closer, as the more distant pair are being more red-shifted.
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cavediver
Member (Idle past 3674 days)
Posts: 4129
From: UK
Joined: 06-16-2005

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Message 30 of 31 (605899)
02-22-2011 5:24 PM 		Reply to: Message 29 by slevesque
02-22-2011 4:35 PM

Re: Question
I'm pretty sure a galaxy 12 billion light years from us would have to be moving faster then the speed of light to be coming at us faster then expansion would be seperating us
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Close but not quite. Even so, I think if we saw this we'd be re-writing most of cosmology...
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