All manner of spooky imagery represents Halloween, or "All Hallow's Eve." Blood-sucking vampires, snarling werewolves, wicked witches, and zombies from the grave - just to name a few - are featured in masks, costumes, and decorations.
Jack-o-lanterns, another familiar sight, light up porches and windows.
Halloween is also associated with the full moon, and tonight's moon will live up to the imagery and then some. This evening, the moon will be full, a "Hunter's Moon," and a "Blue Moon."