Does the Moon Rotate on Its Axis?

It is generally assumed that the Moon rotates on its own axis. This conception will be referred to as SM (Spinning Moon).

This site examines the opposite conception, the NSM (Non-Spinning Moon), using only Euclidean geometry.

It shows that the usual interpretation of the standard model contradicts elementary geometry. The conclusion follows directly: according to Euclidean geometry the Moon does not rotate on its axis.

Start here because ANY subsequent argument depends entirely on this PURELY geometrical analysis.
Then read the full argument here →

Articles

Disk Rotation

A strictly geometrical analysis of the standard model shows that the disk representing the Moon does not rotate on itself.

Moon Rotation

Building on the previous result, this article shows that the Moon behaves exactly like the disk in the model.

Libration

A Python simulation reproduces the longitudinal libration (alternate rotation) . It can also simulate its continuous rotation and confirm, through dynamics, the result obtained through geometry.

FAQ

FAQ1 Does the Moon rotate?
The standard interpretation says yes. This site shows that this interpretation contradicts Euclidean geometry.

FAQ2 Shall we eradicate SM (spinning Moon) if we opt for NSM (non-spinning Moon)?
Probably not totally, due to its implication in the FDC catalogs. See S4A2 of the article Moon Rotation.

FAQ3 Why do we always see the same side of the Moon?
This is usually explained by synchronous rotation. This explanation is examined in S4B1 of the article Moon Rotation.

FAQ4 Why does an astronaut on the Moon see the stars rotate?
This is usually explained by Moon rotation on itself. This explanation is examined in S4C of the article Moon Rotation.

Gilbert Vidal — retired engineer (France)