The Leonids meteor shower runs Nov. 6-30 and puts on an average show of about 15 meteors an hour — except during cyclonic peaks that occur about every 33 years, when hundreds of meteors an hour can be seen. It happened last in 2001, putting us years away from a similar show from this shower created by dust grains left behind by comet 55P/Tempel-Tuttle, discovered in 1865