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Author Topic: Increased Expansion Rate  (Read 2346 times)

Offline porquat

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Increased Expansion Rate
« on: 13/02/2006 03:00:10 »
It's been found that the expansion rate of the universe is increasing. What was the previous expansion rate, and what's the new one?


Offline ukmicky

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Re: Increased Expansion Rate
« Reply #1 on: 13/02/2006 03:29:39 »
i believe its never stopped  increasing,the universe has always been expanding and that expansion has always been accelerating  ever since the big bang,the beginning of time.

« Last Edit: 13/02/2006 03:34:22 by ukmicky »

Offline Soul Surfer

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Re: Increased Expansion Rate
« Reply #2 on: 13/02/2006 23:05:40 »
The reasons for the accelerating expansion theoty come from the measurements of the peak brightness of type 1a supernovae at very high red shifts.

This suggests that at the earliest times the expansion was smooth and slightly slower and more recently it has become slightly faster.

There are still a lot of potential experimental errors in the results but we will have to wait for a few years to see the precise details when many more surpernovae have been observed but the increase does look statistically significant unless other physical reasons can be found to explain the results.

This article has some good graphs in it shpwing how small and uncertain the departure from a normal flat universe it is.

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« Last Edit: 13/02/2006 23:14:39 by Soul Surfer »

The Naked Scientists Forum

Re: Increased Expansion Rate
« Reply #2 on: 13/02/2006 23:05:40 »


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