Perseid Meteor Shower 2010: Sky Show Thursday Night

Aug. 12, 2010 — -- Go outside between midnight and dawn on Friday morning, and if the Perseid meteor shower of 2010 is good to you, you will be able to see the sky falling.

Every year at this time, the Earth passes through the orbit of a comet called Swift-Tuttle, and the result is a meteor shower -- shooting stars, perhaps 50 or 60, and occasionally as many as 100 per hour -- streaking across the night sky as debris from the comet enters the earth's atmosphere and burns up.

Even though the comet is far away now, in an elliptical orbit that only brings it close to the sun once every 133 years, rock and ice from it have spread out in a ring all along its path. The comet itself will probably be pretty good to see if you can hang on until July 2126, but in the meantime, like clockwork, it gives us a meteor shower in mid-August.

This year happens to be a particularly good one if you'd like to wish upon a star. There was a new moon Monday night, which means that the skies should be nice and dark -- especially after midnight on Friday morning, the likely peak time for viewing in North America.

"Expect to see dozens of meteors between midnight and dawn," said Rebecca Johnson, editor of StarDate magazine, published by the McDonald Observatory of the University of Texas. "Some will be faint, some bright. If you get really lucky, you might see a fireball -- a really large meteor streaking from one side of the sky to the other, and leaving a burning tail in its wake. That's pretty rare."

Be alert; most meteors streak by in a second or less, sometimes in clusters. Most of the shooting stars are created by small cometary fragments, some as small as grains of sand, completely vaporized as they plunge into our protective blanket of air.

The best way to see them is to find a nice, dark place with no street lights and as few trees as possible, and look up. You may want to bring a lawn chair or a blanket. The streaks may be anywhere in the sky, though they'll all appear to come from the constellation Perseus, in the northeastern sky, after midnight.