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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.

                                2021 March 15

           IFRAME: https://www.youtube.com/embed/WJua8eXLX9o?rel=0

                     Meteor Fireballs in Light and Sound
   Image Credit & Copyright: Thomas Ashcraft (Radio Fireball Observatory)

   Explanation: Yes, but have you ever heard a meteor? Usually, meteors
   are too far away to make any audible sound. However, a meteor will
   briefly create an ionization trail that can reflect a distant radio
   signal. If the geometry is right, you may momentarily hear -- through
   your radio -- a distant radio station even over static. In the featured
   video, the sounds of distant radio transmitters were caught reflecting
   from large meteor trails by a sensitive radio receiver -- at the same
   time the bright streaks were captured by an all-sky video camera. In
   the video, the bright paths taken by four fireballs across the sky near
   Lamy, New Mexico, USA, are shown first. Next, after each static frame,
   a real-time video captures each meteor streaking across the sky, now
   paired with the sound recorded from its radio reflection. Projecting a
   meteor trail down to the Earth may lead to finding its impact site (if
   any), while projecting its trail back into the sky may lead to
   identifying its parent comet or asteroid.

                  Almost Hyperspace: Random APOD Generator
                       Tomorrow's picture: astro dust
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