If meteors come from one direction, why do some flashes go west to east...and others east to west?
Meteors do come from one direction; as the earth moves through comet debris, the various 'chunks' that form meteors are moving parallel to each other. But just like a railroad track, although the rails are parallel to each other, they appear to spread out as they approach someone standing on the track. It's simply an optical illusion.
