الأحد، 11 أغسطس 2013

Perseids 2013 Meteor Shower - 12 August 2013 - NASA MSFC



http://www.youtube.com/watch?v=tQRp4Oeh9Zs Perseids Meteor Shower 2013 - 12 August 2013 .NASA MSFC - Perseids Meteor Shower 2013 : The Perseid meteor shower has been observed for about 2,000 years, with the earliest information on this meteor shower coming from the Far East. 2013 Perseid meteor shower , Perseids 2013 Just before dawn is the best time to view the Perseid meteor shower, NASA says, an annual event that this year peaks on Aug. 11 and 12. The fireballs are fast and plentiful, the agency adds, with as many as 100 visible in a single hour. NASA recommends finding an open space for optimal viewing. "Perseid meteors come across the sky from all directions," states a news release. "Lie on the ground and look straight up into the dark." Distance yourself as far from artificial light as possible, and give your eyes plenty of time to adjust to the darkness — at least 30 minutes. If not sleeping doesn't sound like a pleasant option, you could get lucky and catch an earthgrazer, "a long, slow, colorful meteor traveling horizontally across the evening sky," EarthSky reports. "Earthgrazer meteors are rare but most exciting and memorable, if you happen to spot one. Perseid earthgrazers can only appear at early to mid-evening, when the radiant point of the shower is close to the horizon." The Perseids are associated with a comet called Swift-Tuttle, which circles the sun every 133 years. Each August, our planet passes through the comet's debris — thousand-year-old dust and ice. The burning up of those bits causes what NASA calls one of the best meteor showers of the year. What to know more about the Perseids? NASA astronomer Bill Cooke will be answering questions live from 11 p.m. Aug. 10 until 3 a.m. Aug. 11. If you can't get outside or the sky is stormy, NASA plans to stream the meteor shower live here.

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