OzOne wrote:

On Fri, 01 Oct 2004 09:57:01 +1200, Nav
scribbled thusly:


The key to understanding resides in where the center of mass of the
earth-moon system resides.

Cheers


Nav, you need to go sailing....without the textbooks OK?


Hey, I learn't that long ago. The amizing thing is the number of
explanations out there that try to come up with the right answer just
using a gravity argument -even in school textbooks!

Cheers