I came a across this a few days ago- here's more information on the Ison meteor shower:
http://earthsky.org/science-wire/com...-meteor-shower
Quote:
Wiegert notes another curiosity: “The shower is going to hit our planet from two directions at once.”
When Earth passes through the debris stream, we will encounter two populations of comet dust. One swarm of dust will be following the Comet ISON into the sun. Another swarm will be moving in the opposite direction, pushed away from the sun by solar radiation pressure. The streams will pepper opposite sides of Earth simultaneously.
“In my experience, this kind of double whammy is unprecedented,” says Wiegert.
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