Everything you need to know to catch this weekend's Orionid meteor shower

The Orionid meteor shower — one of the year's most spectacular natural light shows — is upon us. This weekend, Earth will plow through a dense stream of celestial debris given off by Halley's Comet. These fragments of Halley will collide with the planet's atmosphere at speeds approaching 150,000 miles per hour,… »10/19/12 2:12pm10/19/12 2:12pm