Where's the Missing Dark Matter
Name: Lorraine Sherry
Date: 1993 - 1999
My name is Lorraine Sherry. If this is a duplicate, cancel this
note. The system threw me off. I'm a grad student in instructional technology
at usf Tampa. 2 years ago at the Aspen Physics Institute, Drl Hq.
Hawking gave a lecture on the end of the universe.
It needs a certain amount of matter to contract; else it will expand.
We see (or measure) 1% of the critical mass.
We infer 10% more from relative motion of galaxies (Newton's laws)
Then he says there may be enough matter. So where does he get
this extra factor of 10 to jump from 10% to 100%?
I've been wondering about this for 2 years; I think I must have missed
something very important, but the numbers don't make sense to me.
By the way, my department is working on a project to enable teachers
throughout the state of Florida to telecommunicate with other
classrooms throughout the world. Your science section is impressive,
so you'll be hearing more from me.
He gets it from pure conjecture. Many physicists think that if they were
creating the universe, then they would give it mass exactly equal to the
critical value. The present universe may or may not accord with this prejudice.
The matter is very much in doubt, because even the present rate of expansion of the universe is not
very well measured yet.
One of my colleagues is fond of pointing out that there are a number of
dark matter "problems", and these vary according to the scale on which one views
The point? There is a lot of esthetics that motivates physics (and
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Update: June 2012