                        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 December 10

                           Eclipse on a Polar Day
                 Image Credit & Copyright: Stephanie Ziyi Ye

   Explanation: During polar day, in Arctic and Antarctic summer, the Sun
   stays above the horizon for periods of 24 hours or more. Recorded on
   December 4, this fisheye timelapse image tracks the Sun in multiple
   frames as it completes a circle in the summer sky above Union Glacier,
   Antarctica. Of course on that date, Union Glacier's sky did grow dark
   even though the Sun was above the horizon. Captured during the brief
   period of totality, an eclipsed Sun is at bottom center of the
   composite view. Near the edge of the total eclipse path across planet
   Earth, the Moon's shadow darkens the sky above.

                      Tomorrow's picture: light-weekend
     __________________________________________________________________

       Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
            NASA Official: Phillip Newman Specific rights apply.
                NASA Web Privacy Policy and Important Notices
                      A service of: ASD at NASA / GSFC
                             & Michigan Tech. U.

