Subj : Daily APOD Report
To   : All
From : Alan Ianson
Date : Sun Feb 20 2022 00:23:58

                        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 February 20

                        Aurora Over White Dome Geyser
                   Image Credit & Copyright: Robert Howell

   Explanation: Sometimes both heaven and Earth erupt. Colorful auroras
   erupted unexpectedly a few years ago, with green aurora appearing near
   the horizon and brilliant bands of red aurora blooming high overhead. A
   bright Moon lit the foreground of this picturesque scene, while
   familiar stars could be seen far in the distance. With planning, the
   careful astrophotographer shot this image mosaic in the field of White
   Dome Geyser in Yellowstone National Park in the western USA. Sure
   enough, just after midnight, White Dome erupted -- spraying a stream of
   water and vapor many meters into the air. Geyser water is heated to
   steam by scalding magma several kilometers below, and rises through
   rock cracks to the surface. About half of all known geysers occur in
   Yellowstone National Park. Although the geomagnetic storm that caused
   the auroras subsided within a day, eruptions of White Dome Geyser
   continue about every 30 minutes.

                      Tomorrow's picture: barred spiral
     __________________________________________________________________

       Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
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