Re: Dark Matter / Energy
- From: brian@xxxxxxx (Brian Tung)
- Date: Fri, 10 Feb 2006 11:43:17 -0800 (PST)
I (Brian Tung) wrote:
The problem is that bowling balls are so puny from an astronomical
perspective that the gravitational force is overwhelmed by things like
air resistance, friction, and the Earth's gravity, which in practice
we really can't separate out sufficiently. (Even so, exquisitely
sensitive torsion balances can and have been designed to measure even
this tiny gravitational force.)
I mean, in *ordinary* practice we can't separate them out. Torsion
balances represent a case of rather extraordinary practice. :)
--
Brian Tung <brian@xxxxxxx>
The Astronomy Corner at http://astro.isi.edu/
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.
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