First Day of Fall !!!!!

Not only will Northern America witness the beginning of autumn at 11:09 Eastern tonight, there will be a full moon in the sky. Put those two occurrences together and you'll get the rare "super harvest moon."

"The two sources of light will mix together to create a kind of 360-degree, summer-autumn twilight glow," NASA Science writes.

This event has not occurred for 20 years, and probably will not reoccur until 2029.

-Washington Post-