aphasiac wrote:
vosmiura wrote:
How about 地球から月の裏側を見ることはできない。 It is impossble to see the back of the moon from the Earth. Duh.
That's actually an interesting and little known fact - the moon rotates at the same speed as the earth, so the same half is always facing us, and the other half (the "dark side of the moon") is always facing away.
No one knew what it looked like until 1959!
http://en.wikipedia.org/wiki/Far_side_of_the_Moon
Not quite stated accurately, because it has nothing to do with the Earth's rotational speed. Better to say the moon's rotational speed is the same as its own orbital period, thus facing the same side constantly to the center point of its orbit. (Gravitational interplay between bodies of different size usually result in this, after very long periods of time; Mercury is locked into the same thing with the sun -- one side perpetually faces it.)
Last edited by Wally (2009 August 27, 5:56 pm)