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I like Wiki as for me I can wander off on the links and from those links to others..and the good thing is most well everthing is new..even stuff I knew once presents that way.... I wish I had it when I was a kid..the only reason I was good at chemistry in the early days was becasue those were the only books I had .. a relation who went to Uni had them so I read them when we visited ... kids are very fortunate today to be able to source anything how wonderful for an enquiring mind.
alex
Those sums did not take into account time..I just realised so I will have another look..but you need time when on the scale of the solar system because messages take long times to get where they are going... this is why I say there must exist in effect different "centers"everything will think they orbit a common center but if you stood back they must all orbit where they think other objects are..hence time is an ingredient... evn doing it via a lever you wouold have to look at it that way...
anyways I am looking at it all again today ... any math experience must be good for me.
alex
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