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Old November 2nd 19, 05:59 PM posted to sci.astro.research
Jos Bergervoet
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Posts: 126
Default Is the Universe Younger than We Thought?

On 19/11/02 9:50 AM, Steve Willner wrote:
...

... 1. both the local ("direct") measurements
and the distant ("indirect") measurements are made by two
_independent_ methods, which agree in each case. That is, the two
direct methods (SNe, lensing) agree with each other, and the two
indirect methods (CMB, something complicated) agree with each other,
but the direct and indirect measurements disagree.

2. contrary to what I wrote earlier, even a non-physical change of
dark energy with time (say an abrupt increase at some fine-tuned
epoch) cannot fix the disagreement.


Indeed someone asks this question at http://youtu.be/K1496gv8KCo?t=3785
(at about z=10^(10) in the video, I believe..) and the answer given is
that it cannot be an abrupt change, "it must be smooth". The presenter's
answer seems to invoke (partly) other observations that rule it out. (So
change in dark energy might fix it but create new disagreements, which
would bring it in category 3, below.. Or would the discrepancy already
be in matching the data actually discussed here?)

3. while there have been several suggestion for new physics to fix
the problem, none of them so far seems to work without disagreeing
with other data.

What fun!


Yes! So why are only 20 people attending?!

--
Jos