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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.   
      
                                    2022 May 22   
      
                       A Large Tsunami Shock Wave on the Sun   
              Image Credit: NSO/AURA/NSF and USAF Research Laboratory   
      
      Explanation: Tsunamis this large don't happen on Earth. During 2006, a   
      large solar flare from an Earth-sized sunspot produced a tsunami-type   
      shock wave that was spectacular even for the Sun. Pictured here, the   
      tsunami wave was captured moving out from active region AR 10930 by the   
      Optical Solar Patrol Network (OSPAN) telescope in New Mexico, USA. The   
      resulting shock wave, known technically as a Moreton wave, compressed   
      and heated up gasses including hydrogen in the photosphere of the Sun,   
      causing a momentarily brighter glow. The featured image was taken in a   
      very specific red color emitted exclusively by hydrogen gas. The   
      rampaging tsunami took out some active filaments on the Sun, although   
      many re-established themselves later. The solar tsunami spread at   
      nearly one million kilometers per hour, and circled the entire Sun in a   
      matter of minutes.   
      
                    Tomorrow's picture: andromeda now and again   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                         A service of: ASD at NASA / GSFC   
                                & Michigan Tech. U.   
      
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