[davidboyd] Cool Papa Boyd: Hard day's night

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Posted by Cool Papa Boyd:
Hard day's night
http://davidboyd.org/posts/1169484813.shtml


   [1]Powell:

     For the last few billion years the Moonâs gravity has been raising
     tides in Earthâs oceans which the fast spinning Earth attempts to
     drag ahead of the sluggishly orbiting Moon. The result is that the
     Moon is being pushed away from Earth by 1.6 inches (4 centimeters)
     per year and our planetâs rotation is slowing.
     If left unabated the Moon would continue in its retreat until it
     would take bout 47 days to orbit the Earth. Both Earth and Moon
     would then keep the same faces permanently turned toward one
     another as Earthâs spin would also have slowed to one rotation
     every 47 days.

   Too bad for surfers.

References

   1. http://www.space.com/scienceastronomy/070122_temporary_moon.html