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.

                                2023 June 26
     [2]An orange sky hovers above snow-covered mountains. A blurry line
    divides the orange sky from a darker sky. In the foreground are hills
   and a house. Please see the explanation for more detailed information.

                    The Belt of Venus over Mount Everest
              Image Credit & Copyright: [3]Soumyadeep Mukherjee

   Explanation: You've surely seen it, but you might not have noticed it.
   During a cloudless [4]twilight, just before [5]sunrise or after
   [6]sunset, part of the atmosphere above the horizon appears slightly
   dark and off-color. Called the [7]Belt of Venus, this transitional band
   between the dark [8]eclipsed sky and the bright day sky can be seen
   most prominently in the direction [9]opposite the Sun. Straight above,
   [10]blue sky is normal sunlight reflecting off the atmosphere, while
   near the horizon the clear sky can [11]appear more orange or red. In
   the [12]Belt of Venus, the atmosphere reflects more light from the
   setting (or rising) Sun and so [13]appears more red. Featured here, the
   [14]Belt of Venus was photographed over several [15]Himalayan mountains
   including, second from the right, [16]Mount Everest, the [17]tallest
   mountain on [18]Earth. Although usually [19]not mentioned, the belt is
   [20]frequently [21]caught [22]by [23]accident [24]in [25]other
   [26]photographs.

                 Tomorrow's picture: ultraviolet red planet
     __________________________________________________________________

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    Authors & editors: [38]Robert Nemiroff ([39]MTU) & [40]Jerry Bonnell
                                 ([41]UMCP)
          NASA Official: Phillip Newman [42]Specific rights apply.
              [43]NASA Web Privacy Policy and Important Notices
                A service of: [44]ASD at [45]NASA / [46]GSFC,
                         [47]NASA Science Activation
                           & [48]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2306/BeltofEverest_Mukherjee_4000_annotated.jpg
   3. https://www.instagram.com/soumyadeepmukherjeephotos/
   4. https://en.wikipedia.org/wiki/Twilight
   5. https://apod.nasa.gov/apod/ap220924.html
   6. https://apod.nasa.gov/apod/ap230328.html
   7. https://en.wikipedia.org/wiki/Belt_of_Venus
   8. https://apod.nasa.gov/apod/ap030822.html
   9. https://apod.nasa.gov/apod/ap190624.html
  10. https://spaceplace.nasa.gov/blue-sky/en/
  11. https://www.universetoday.com/77115/why-is-the-sunset-red/
  12. https://skyandtelescope.org/astronomy-blogs/the-belt-of-venus/
  13. https://apod.nasa.gov/apod/ap201111.html
  14. https://youtu.be/qA4umk8HGMY
  15. https://en.wikipedia.org/wiki/Himalayas
  16. https://apod.nasa.gov/apod/ap110417.html
  17. https://en.wikipedia.org/wiki/List_of_mountain_peaks_by_prominence
  18. https://solarsystem.nasa.gov/planets/earth/overview/
  19. https://img.huffingtonpost.com/asset/5bad2b9b2200003401da9338.jpeg
  20. https://apod.nasa.gov/apod/ap011209.html
  21. https://apod.nasa.gov/apod/ap010601.html
  22. https://apod.nasa.gov/apod/ap180705.html
  23. https://apod.nasa.gov/apod/ap120529.html
  24. https://apod.nasa.gov/apod/ap191011.html
  25. https://apod.nasa.gov/apod/ap230509.html
  26. https://apod.nasa.gov/apod/ap010501.html
  27. https://apod.nasa.gov/apod/ap230625.html
  28. https://apod.nasa.gov/apod/archivepix.html
  29. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  30. https://apod.nasa.gov/apod/lib/aptree.html
  31. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  32. https://apod.nasa.gov/apod/calendar/allyears.html
  33. https://apod.nasa.gov/apod.rss
  34. https://apod.nasa.gov/apod/lib/edlinks.html
  35. https://apod.nasa.gov/apod/lib/about_apod.html
  36. https://asterisk.apod.com/discuss_apod.php?date=230626
  37. https://apod.nasa.gov/apod/ap230627.html
  38. http://www.phy.mtu.edu/faculty/Nemiroff.html
  39. http://www.phy.mtu.edu/
  40. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  41. http://www.astro.umd.edu/
  42. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  43. https://www.nasa.gov/about/highlights/HP_Privacy.html
  44. https://astrophysics.gsfc.nasa.gov/
  45. https://www.nasa.gov/
  46. https://www.nasa.gov/centers/goddard/
  47. https://science.nasa.gov/learners
  48. http://www.mtu.edu/