The Orionid meteor shower peaks this week, and if you have clear skies overnight this weekend, be sure to get outside so you can check out the show.Meteor showers occur when the path of Earth's orbit takes it across the path of another object, usually a comet, that has left a debris trail behind it. For the Orionid meteor shower, that object was the famous Halley's Comet, and the meteors are caused by tiny particles of dust left behind by the comet burning up after encountering our atmosphere at a speed of over 237,000 km/h.