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.

                                2022 March 8
     [2]The featured image shows Moon in inverted colors, with the dark
      parts appearing bright, and the bright parts appearing dark. More
   surface detail is visible. Please see the explanation for more detailed
                                information.

                           Moon in Inverted Colors
                 Image Credit & Copyright: [3]Dawid Glawdzin

   Explanation: Which moon is this? It's [4]Earth's moon -- but in
   inverted colors. Here, the pixel values corresponding to light and dark
   areas have been translated in reverse, or inverted, producing a
   false-color representation reminiscent of a black and white
   [5]photographic negative. However, this is an [6]inverted color image
   -- where the muted colors of [7]the moon are real but digitally
   [8]exaggerated before inversion. Normally bright rays from the large
   [9]crater Tycho dominate the southern (bottom) features as easily
   followed dark green lines emanating from the 85-kilometer diameter
   impact site. Normally dark [10]lunar mare appear light and silvery. The
   image was acquired in [11]Southend-on-Sea, [12]England, [13]UK.
   Historically, [14]astronomical images recorded on [15]photographic
   plates were directly examined on [16]inverted-color negatives because
   it helped the [17]eye pick out faint details.

                   Tomorrow's picture: martian rock flower
     __________________________________________________________________

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     __________________________________________________________________

    Authors & editors: [29]Robert Nemiroff ([30]MTU) & [31]Jerry Bonnell
                                 ([32]UMCP)
          NASA Official: Phillip Newman [33]Specific rights apply.
              [34]NASA Web Privacy Policy and Important Notices
                A service of: [35]ASD at [36]NASA / [37]GSFC
                           & [38]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2203/InvertedMoon_Glawdzin_2048.jpg
   3. mailto: dglawdzin at gmail dot com
   4. https://moon.nasa.gov/
   5. https://en.wikipedia.org/wiki/Negative_(photography)
   6. https://www.quora.com/How-exactly-does-color-inversion-work
   7. https://apod.nasa.gov/apod/ap160201.html
   8. https://apod.nasa.gov/apod/ap210831.html
   9. https://en.wikipedia.org/wiki/Tycho_(lunar_crater)
  10. https://en.wikipedia.org/wiki/Lunar_mare#/media/File:Moon_names.svg
  11. https://youtu.be/rv_fuDFxhWc
  12. https://en.wikipedia.org/wiki/England
  13. https://en.wikipedia.org/wiki/United_Kingdom
  14. https://apod.nasa.gov/apod/ap200426.html
  15. https://www.atnf.csiro.au/outreach/education/senior/astrophysics/photometry_photographicastro.html
  16. https://i.ytimg.com/vi/8T6cPfb5fXg/maxresdefault.jpg
  17. https://www.nei.nih.gov/learn-about-eye-health/healthy-vision/how-eyes-work
  18. https://apod.nasa.gov/apod/ap220307.html
  19. https://apod.nasa.gov/apod/archivepix.html
  20. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  21. https://apod.nasa.gov/apod/lib/aptree.html
  22. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  23. https://apod.nasa.gov/apod/calendar/allyears.html
  24. https://apod.nasa.gov/apod.rss
  25. https://apod.nasa.gov/apod/lib/edlinks.html
  26. https://apod.nasa.gov/apod/lib/about_apod.html
  27. http://asterisk.apod.com/discuss_apod.php?date=220308
  28. https://apod.nasa.gov/apod/ap220309.html
  29. http://www.phy.mtu.edu/faculty/Nemiroff.html
  30. http://www.phy.mtu.edu/
  31. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  32. http://www.astro.umd.edu/
  33. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  34. https://www.nasa.gov/about/highlights/HP_Privacy.html
  35. https://astrophysics.gsfc.nasa.gov/
  36. https://www.nasa.gov/
  37. https://www.nasa.gov/centers/goddard/
  38. http://www.mtu.edu/