> I want to know the value of the "Big G", the Universal Gravitational cons= tant, Ignoring for the purposes of the exercise that there is a significant body of opinion that it may not be one :-). Nor may (almost?) any other "constant" that we think we know. The Fine Structure constant may vary with time (and time would vary with the fine structure constant :-) ) and the universe MAY be anisotropic wrt the FSC. ie "Look out" in one direction and you may see results which vary slightly from those in another direction. All very annoying. Results to date look very very very like systemic error if you can't believe they can be true, but systemic error had been sought with thimbles and care (not to mention forks and hope) but to then, to no avail. Things may have changed since then (within last year). A good thing about G being known with such imprecision is that the underlying "reality" can wander around a bit before we notice too much :-). Russell --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .