月球的 公轉周期 與它的自轉周期 是否真的”完全一樣”, 絲毫不差 ?

呢個係潮汐藕合(tidal coupling, 或者tidal locking)既現象
係指月亮因為地球對佢造成既潮汐作用, 使到佢既rotational energy變成friction loss, 減慢佢既自轉速度最終達到equilibrium, 就係永遠同一面都面向地球.

如果月球自轉速度同公轉速度唔一樣, 佢就會好似俾地球扯住兼fing 黎fing 去, energy就在deformation既過程中流失.


轉載至星匯點討論區
http://starrix.org/bbs/viewthread.php?tid=272&extra=page%3D1

那裏有很多物理的碩士畢業生及天文學的高手, 假若仍不明白, 可再繼續發問.

應該可以看到月球的另外一面的(不知多少年)
月球的公轉周期和自轉周期不一定是一樣的
詳情可以去YAHOO搜尋一下的!

Someting not really answering your question, but it may give you some ideas.

The tides on Earth is the result of the gravitational pull of the Sun and Moon, but the tide will slow down the rotation speed of the earth due to friction. In fact, the reduce in rotation speed is too slow compare with our daily life, but the Earth's rotating speed is decreasing.

There is no common or well known answer to your question, in fact, there is many theory in the formation of Moon, it is still a quest of its formation and its behaviour. Not ony its self and common rotating speed, but also its orbit.

我想會看到的,因為月球會自轉的,一萬年之後, 如果人類未絕種,自然會看到的!!!

2008-06-30 10:06:50 補充：
因為月球的公轉周期與它的自轉周期是完全一樣的,所以看到的月球是一樣的!