Science a GoGo's Home Page Forums General Discussion Not-Quite-Science Forum Is our Moon hollow?

actually its quite well known that the moon rotates once every orbit.

dehammer wrote:
"its quite well known that the moon rotates once every orbit."

"Orbit" is ambiguous. Do you mean the sidereal period or the synodic period? They are two different definitions of the word orbit.

Hi Bagpi:

I too have been aware that astronomers recite that the moon rotates once in the course of its orbit of about 27.23 days.

I think you will get a better understanding of my comment on rotation of objects and magnetic results if you rotate a magnet in a wire coil about once a month and see what you generate.

One rotation to me is a 360 degree turn. If the moon, strangely enough did not rotate at least once per revolution it would not show us the same side all the time. When it traveled from one side of the earth to the other side it would show its own other side to us. However from the laymans point of view you could fasten a rope to one side of the moon and to one side of the earth and if they rotated in sync it would be like you swinging a ball around your head with the same side of the ball facing you at all times while the string remained taut.

Minimal rotation, if any, is not productive of electromechanical energy. Cheers.
jjw

not to get bogged down in word games, but the moon "appears" to rotate exactly once in the time it circles the earth. now since the earth has circled the sun a good bit, the moon must have moved a little bit more. These are facts that everyone knows, but hardly thinks of. not everyone knows what "sidereal period or the synodic period" are. the discussion was about what everyone knew or didnt know.

The moon is hollow. When Louis Armstrong took the first step onto it, he heard an echo from within.
He thought to himself, "what a wonderful world", and he thought to himself "what a wonderful world"