[LEAPSECS] Far past and far future
Clive D.W. Feather
clive at davros.org
Thu May 26 17:54:13 EDT 2011
> But I took
> some numbers from the Williams paper that was cited and played with them in
> a spreadsheet. These suggest that about 90% of the terrestrial rotational
> angular momentum reappears as lunar orbital angular momentum. On the other
> hand, I can't see where the rest of it would go - apparently observations
> show no indication that the Earth's orbit is growing.
I've also just realized that the numbers are within the range of
experimental error. I get the following angular momenta out of
Earth Moon Total
2450 My ago 7450 27500 34950
900 My ago 6730 28100 34830
620 My ago 6400 28400 34800
Now 5840 28900 34740
That's a total loss of under 1%. Some of the source numbers are +/-3%, and
no doubt there are rounding errors in my calculations.
Clive D.W. Feather | If you lie to the compiler,
Email: clive at davros.org | it will get its revenge.
Web: http://www.davros.org | - Henry Spencer
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