Subject: RE: (urth) No Grand Gnab Date: Fri, 14 Feb 2003 11:31:37 -0700 From: "Dan'l Danehy-Oakes"
> What confuses me about this article is that they seem (or=20 > claim) to know just how much dark matter there is in the > universe - I'm not sure how they're coming up with those > numbers. Probably reverse-engineering ... with data like this, I=20 suppose they have enough information to work out the higher- order differentials (i.e., the rate change of the rate of=20 change of ... ) of the expansion of the universe. Given that, they could extrapolate _forward_ and determine whether the slowing expansion will reverse into a collapse or just continue to expand at a rate that asymptotically approaches zero. Or something. Hey, I just live in the universe, I don't run it... --