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.

                                2025 April 22
    [2]A full Moon is shown but with a much more detailed surface than is
       usually visible. Many craters, dark lunar mare, and light lunar
   highlands are discernable. Please see the explanation for more detailed
                                information.

                   Terminator Moon: A Moonscape of Shadows
                   Image Credit & Copyright: [3]Rich Addis

   Explanation: What's different about this Moon? It's the [4]terminators.
   In the featured image, you can't directly see any [5]terminator -- the
   line that divides the light of day from the dark of night. That's
   because the [6]featured image is a digital composite of many
   near-terminator lunar strips over a full [7]Moon. Terminator regions
   show the longest and most [8]prominent shadows -- shadows which, by
   their contrast and length, allow a flat photograph to appear
   [9]three-dimensional. The overlay images were taken over two weeks in
   early April. Many of the Moon's [10]craters stand out because of the
   [11]shadows they all cast to the right. The image shows in graphic
   detail that the [12]darker regions known as maria are not just darker
   than the rest of the [13]Moon -- they are also [14]flatter.

       Dial-A-Moon: [15]Find the Moon phase on your birthday this year
                    Tomorrow's picture: almost everything
     __________________________________________________________________

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    Authors & editors: [27]Robert Nemiroff ([28]MTU) & [29]Jerry Bonnell
                                 ([30]UMCP)
          NASA Official: Amber Straughn [31]Specific rights apply.
            [32]NASA Web Privacy, [33]Accessibility, [34]Notices;
                A service of: [35]ASD at [36]NASA / [37]GSFC,
                         [38]NASA Science Activation
                           & [39]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2504/TerminatorMoon_Addis_3558.jpg
   3. https://www.instagram.com/richaddisastro/
   4. https://en.wikipedia.org/wiki/Terminator_(solar)
   5. https://apod.nasa.gov/apod/ap180522.html
   6. https://www.instagram.com/p/DIcPVpbsRO4/
   7. https://science.nasa.gov/moon/
   8. https://i.pinimg.com/736x/1e/c4/a9/1ec4a9503ab9fdfaede7f3a6b93e5ba0--light-and-shadow-cat-silhouette.jpg
   9. https://solarsystem.nasa.gov/gltf_embed/2366/
  10. https://spaceplace.nasa.gov/impact-crater/
  11. https://apod.nasa.gov/apod/ap211125.html
  12. https://en.wikipedia.org/wiki/Lunar_mare#/media/File:Moon_names.svg
  13. https://moon.nasa.gov/observe-the-moon-night/resources/moon-map/
  14. https://cache.desktopnexus.com/thumbseg/154/154798-bigthumbnail.jpg
  15. https://svs.gsfc.nasa.gov/5415/
  16. https://apod.nasa.gov/apod/ap250421.html
  17. https://apod.nasa.gov/apod/archivepix.html
  18. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  19. https://apod.nasa.gov/apod/lib/aptree.html
  20. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  21. https://apod.nasa.gov/apod/calendar/allyears.html
  22. https://apod.com/feed.rss
  23. https://apod.nasa.gov/apod/lib/edlinks.html
  24. https://apod.nasa.gov/apod/lib/about_apod.html
  25. https://asterisk.apod.com/discuss_apod.php?date=250422
  26. https://apod.nasa.gov/apod/ap250423.html
  27. http://www.phy.mtu.edu/faculty/Nemiroff.html
  28. http://www.phy.mtu.edu/
  29. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  30. http://www.astro.umd.edu/
  31. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  32. https://www.nasa.gov/about/highlights/HP_Privacy.html
  33. https://www.nasa.gov/general/accessibility/
  34. https://www.nasa.gov/privacy/
  35. https://astrophysics.gsfc.nasa.gov/
  36. https://www.nasa.gov/
  37. https://www.nasa.gov/centers/goddard/
  38. https://science.nasa.gov/learners
  39. http://www.mtu.edu/