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 November 25
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                            At the Shadow's Edge
             Image Credit & [3]Copyright: [4]Jean-Francois Gout

   Explanation: Shaped like a cone tapering into space, the Earth's dark
   [5]central shadow or umbra has a circular cross-section. It's wider
   than the Moon at the distance of the Moon's orbit though. But [6]during
   the lunar eclipse of November 18/19, part of the Moon remained just
   outside the umbral shadow. The successive pictures in this composite of
   5 images from that [7]almost total lunar eclipse were taken over a
   period of about 1.5 hours. The series is aligned to trace part of the
   cross-section's [8]circular arc, with the central image at maximum
   eclipse. It shows a bright, thin sliver of the lunar disk still beyond
   the shadow's curved edge. Of course, even within the shadow the Moon's
   surface is not completely dark, reflecting the reddish hues of filtered
   sunlight scattered [9]into the shadow by Earth's atmosphere.

       Notable APOD Submissions: [10]Lunar Eclipse of 2021 November 19
                     Tomorrow's picture: pixels in space
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      [11]< | [12]Archive | [13]Submissions | [14]Index | [15]Search |
   [16]Calendar | [17]RSS | [18]Education | [19]About APOD | [20]Discuss |
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     __________________________________________________________________

    Authors & editors: [22]Robert Nemiroff ([23]MTU) & [24]Jerry Bonnell
                                 ([25]UMCP)
          NASA Official: Phillip Newman [26]Specific rights apply.
              [27]NASA Web Privacy Policy and Important Notices
                A service of: [28]ASD at [29]NASA / [30]GSFC
                           & [31]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2111/Gout_EclipseCollage-small.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.jfgout.com/About
   5. https://svs.gsfc.nasa.gov/cgi-bin/details.cgi?aid=11516
   6. https://www.jfgout.com/Lunar-Eclipses/Lunar-Eclipse-of-November-19th-2021/
   7. https://moon.nasa.gov/news/168/an-almost-total-lunar-eclipse/
   8. https://apod.nasa.gov/apod/ap130425.html
   9. https://apod.nasa.gov/apod/ap200124.html
  10. https://www.facebook.com/media/set/?set=a.4165400376897483&type=3
  11. https://apod.nasa.gov/apod/ap211124.html
  12. https://apod.nasa.gov/apod/archivepix.html
  13. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  14. https://apod.nasa.gov/apod/lib/aptree.html
  15. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  16. https://apod.nasa.gov/apod/calendar/allyears.html
  17. https://apod.nasa.gov/apod.rss
  18. https://apod.nasa.gov/apod/lib/edlinks.html
  19. https://apod.nasa.gov/apod/lib/about_apod.html
  20. http://asterisk.apod.com/discuss_apod.php?date=211125
  21. https://apod.nasa.gov/apod/ap211126.html
  22. http://www.phy.mtu.edu/faculty/Nemiroff.html
  23. http://www.phy.mtu.edu/
  24. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  25. http://www.astro.umd.edu/
  26. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  27. https://www.nasa.gov/about/highlights/HP_Privacy.html
  28. https://astrophysics.gsfc.nasa.gov/
  29. https://www.nasa.gov/
  30. https://www.nasa.gov/centers/goddard/
  31. http://www.mtu.edu/