HALLOWEEN FIREBALLS: This weekend, Earth could run
into a stream of gravelly debris from Comet Encke, source of the annual
Taurid meteor shower. The last time this happened, ten years ago in
Oct. 2005, the encounter sparked a two-week display of bright meteors
called the "Halloween fireballs." Will it happen again in 2015? Visit http://spaceweather.com for more information and observing tips.