Astronomy Picture of the Day

   [1]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 April 23

         IFRAME: [2]https://www.youtube.com/embed/zIqG42AD4Gw?rel=0

                      Flying Over the Earth at Night II
     Video Credit: [3]NASA, [4]Gateway to Astronaut Photography, [5]ISS
             Expedition 53; Music: [6]The Low Seas (The 126ers)

   Explanation: Recorded during 2017, timelapse sequences from the
   International Space Station are compiled in this [7]serene video of
   planet Earth at Night. Fans of low Earth orbit can start by enjoying
   the view as green and red aurora borealis [8]slather up the sky. The
   night scene tracks from northwest to southeast across North America,
   toward the Gulf of Mexico and the Florida coast. A second sequence
   follows European city lights, crosses the Mediterranean Sea, and passes
   over a bright Nile river in northern Africa. Seen from the orbital
   outpost, erratic flashes of lightning appear in thunder storms below
   and stars rise above the planet's curved horizon through a faint
   [9]atmospheric airglow. Of course, from home you can always check out
   the [10]vital signs of Planet Earth Now.

                          Celebrate: [11]Earth Day
                      Tomorrow's picture: light-weekend
     __________________________________________________________________

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    Authors & editors: [23]Robert Nemiroff ([24]MTU) & [25]Jerry Bonnell
                                 ([26]UMCP)
          NASA Official: Phillip Newman [27]Specific rights apply.
              [28]NASA Web Privacy Policy and Important Notices
                A service of: [29]ASD at [30]NASA / [31]GSFC
                           & [32]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://www.youtube.com/embed/zIqG42AD4Gw?rel=0
   3. https://www.nasa.gov/
   4. https://eol.jsc.nasa.gov/
   5. https://www.nasa.gov/mission_pages/station/expeditions/expedition53/index.html
   6. https://www.youtube.com/watch?v=BCh90tfSTgA
   7. https://eol.jsc.nasa.gov/BeyondThePhotography/CrewEarthObservationsVideos/
   8. https://apod.nasa.gov/apod/ap210114.html
   9. https://apod.nasa.gov/apod/ap210418.html
  10. https://climate.nasa.gov/earth-now/#/vitalsign?vitalsign=satellites&altid=0&animating=f&start=&end=
  11. https://www.nasa.gov/earth-day-2021
  12. https://apod.nasa.gov/apod/ap210422.html
  13. https://apod.nasa.gov/apod/archivepix.html
  14. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  15. https://apod.nasa.gov/apod/lib/aptree.html
  16. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  17. https://apod.nasa.gov/apod/calendar/allyears.html
  18. https://apod.nasa.gov/apod.rss
  19. https://apod.nasa.gov/apod/lib/edlinks.html
  20. https://apod.nasa.gov/apod/lib/about_apod.html
  21. http://asterisk.apod.com/discuss_apod.php?date=210423
  22. https://apod.nasa.gov/apod/ap210424.html
  23. http://www.phy.mtu.edu/faculty/Nemiroff.html
  24. http://www.phy.mtu.edu/
  25. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  26. http://www.astro.umd.edu/
  27. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  28. https://www.nasa.gov/about/highlights/HP_Privacy.html
  29. https://astrophysics.gsfc.nasa.gov/
  30. https://www.nasa.gov/
  31. https://www.nasa.gov/centers/goddard/
  32. http://www.mtu.edu/