Is this science question impossible to answer?

[gumboil]

Why is the period of the moon's rotation exactly the same as the time it takes to orbit the earth?

I've been given to understand that no other moon in the solar system does this, so what's so special about Earth?

Thanks.

[Clanad]

The phenomena is known as tidal Lock and most other moons in our solar system are tidally locked with their planets. The exceptions seem to be the gas giants such as Jupiter and Saturn and even in those situations it's only the outer moons that are not tidally locked...

[fo3nix]

Both exibit a type of SHM motion. When two oscillators are coupled together (by gravity here), they start to synchronise.

[R1Geezer]

Why would it be impossible to answer? It's a fairly well understood situation, as clanad says, tidal locking!

[gumboil]

A chap asked this very question in a letter that appeared on the letters page in last Friday or Saturday's Daily Telegraph.

He said that despite him having a physics degree, no one had ever been able to give him a "satisfactory answer" to it and it sounded like he originally asked this question years ago.

Maybe it's just that he was dissatisfied with all the answers he received or felt they were incomplete, He seemed fairly certain though, that Earth was unique in this respect.

Are there any doubtful or controversial aspects of the explanation.

[eltelioni]

No, there is nothing controversial about the "tidal-locking" explanation. As the others have said, it is the norm rather than the exception.