The Coriolis Effect and Drains
Date: 1993 - 1999
When water goes down the drain, it rotates due to the Coriolis effect.
What accounts for the rotation of galaxies? Why do galaxies spread
out in a disk - is there some kind of gravity surface on which dust
collects? Same for disks of dust around stars - why disks? Why
are all the solar planets co-planar (or nearly so)? Why not random
Well, I'll take on the first one. Get a physics book and see if you can
estimate the size that a wash basin would have to be to be affected by
the Coriolis effect when it is draining.
What does your favorite encyclopedia say about galactic rotation and
the plane in which the planets move?
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Update: June 2012