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Re: Hubble's Constant

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  • Subject: [mg92908] Re: Hubble's Constant
  • From: John Doty <jpd at>
  • Date: Sat, 18 Oct 2008 06:24:29 -0400 (EDT)
  • References: <gd9lke$ejf$>

Kevin J. McCann wrote:
> I am using the PhysicalConstants and Units packages. Hubble's constant 
> yields
> HubbleConstant
> 3.2 x 10^-18/Second
> however
> Convert[HubbleConstant, (Kilo Meter/Second)/(Mega Parsec)]
> gives 98.7424 Kilo Meter/(Mega Parsec Second)

Needs updating.

> The accepted value is 70 km/s/Mpc. Am I missing something?

Only a little history. Tells you which gang of cosmologists had 
Wolfram's ear back in the days of the 50 versus 100 turf wars.

> Kevin

John Doty, Noqsi Aerospace, Ltd.
The axiomatic method of mathematics is one of the great achievements of 
our culture. However, it is only a method. Whereas the facts of 
mathematics once discovered will never change, the method by which these 
facts are verified has changed many times in the past, and it would be 
foolhardy to expect that changes will not occur again at some future 
date. - Gian-Carlo Rota

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