On 2-10-2015 22:04, clipka wrote:
> Am 02.10.2015 um 01:06 schrieb David Given:
>
>> Did you know the moon's gravitation field is
>> lumpy? The lunar ocean varies in height by about a kilometre.)
>
> Well, I'm quite the "lunatic", but here's a fact that's news even to me.
>

This is also true for our own Earth in fact. Local variations of the 
gravitational field make the oceans' surface vary by several (tens of) 
meters, sometimes over quite short distances.

-- 
Thomas

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