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                           Astronomy Picture of the Day   
      
       Discover the cosmos! Each day a different image or photograph of our   
         fascinating universe is featured, along with a brief explanation   
                       written by a professional astronomer.   
      
                                   2024 August 9   
      
                                  A Perseid Below   
               Image Credit: Ron Garan, ISS Expedition 28 Crew, NASA   
      
      Explanation: Denizens of planet Earth typically watch meteor showers by   
      looking up. But this remarkable view, captured on August 13, 2011 by   
      astronaut Ron Garan, caught a Perseid meteor by looking down. From   
      Garan's perspective on board the International Space Station orbiting   
      at an altitude of about 380 kilometers, the Perseid meteors streak   
      below, swept up dust from comet Swift-Tuttle. The vaporizing comet dust   
      grains are traveling at about 60 kilometers per second through the   
      denser atmosphere around 100 kilometers above Earth's surface. In this   
      case, the foreshortened meteor flash is near frame center, below the   
      curving limb of the Earth and a layer of greenish airglow, just below   
      bright star Arcturus. Want to look up at a meteor shower? You're in   
      luck, as the 2024 Perseid meteor shower is active now and predicted to   
      peak near August 12. With interfering bright moonlight absent, this   
      year you'll likely see many Perseid meteors under clear, dark skies   
      after midnight.   
      
                         Tomorrow's picture: light-weekend   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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