I haven't seen swirls like that in a comet's tail.

By the way, the Moon's surface is much dimmer than that in comparison to
the Earth; 
here are two shots that contain both:
http://antwrp.gsfc.nasa.gov/apod/ap950629.html
http://antwrp.gsfc.nasa.gov/apod/ap980904.html
(from the archive of Astronomy Picture of the Day)

-- 
Anton Sherwood  --  br0### [at] p0b0xcom  --  http://ogre.nu/

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