Aaron forwarded this interesting tidbit:
On Oct. 31st, the crescent Moon will approach Venus in a conjunction of startling beauty. The close encounter is best seen just after sunset. Then, Venus will be seen to hover just above the southwestern horizon as the “evening star” (“Hesperus”, for you mythology fans), the brightest light in the sky, while the exquisitely slender Moon (“Feather Moon” according to our Native American brethren) approaches just a few degrees below.
Happening on Halloween just makes it even cooler.