The Orionids meteor shower, which is generated by the famous Halley’s Comet, is happening this week. Halley’s Comet is only visible from Earth once every 75 years, but residual chunks from its tail generate two annual meteor showers: the Eta Aquarids in May and the Orionids in October. Meteor showers typically come from the dusty, rocky guts that comets leave behind as they fly through the solar system. When Earth passes through a comet’s tail, its gravitational pull attracts their debris, which then enters the atmosphere, burns up, and is seen as a falling star or meteor.

Tonight’s Orionid meteor shower is your last chance of the year to catch a glimpse of this famous comet’s guts as they rain down through Earth’s atmosphere. If you can’t check it out in person, you can always watch the live webcast from the online observatory, Slooh, which will begin at 8 pm ET on Wednesday Oct. 21. We’ve included the webcast at the end of this post, or you can go to Slooh.com and check it out as well as their library of broadcasts on past cosmic events like solar eclipses, lunar eclipses, and much more. FULL REPORT