>> One can't help laughing at these people Jim.
>
>So you are laughing at the claim that the distance
>to the Moon is measured to a precision better than 2 cm?
>
>You didn't bother to look it up, did you?
>
>Lunar Laser Ranging has been going on for more than 37 years now,
>at several observatories in US and Europe.
> http://www.csr.utexas.edu/mlrs/
> http://tau.fesg.tu-muenchen.de/~fesg/web/forschung/llr/llr.php
> http://physics.ucsd.edu/~tmurphy/apollo/apollo.html
> http://www.obs-azur.fr/gemini/equipes/rdm/meo/
>
>But don't believe it, Henri.
>Laugh at them.
>That make you look so intelligent.

Paul, since the moon's radial speed wrt Earth is never very large, the use of
constant c for light speed is quite OK.

All I did was point out that, no matter how 'accurate' the answer, it would be
impossible to actually put an accurate figure on the degree of that accuracy.