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 February 1

     IFRAME: [2]https://www.youtube.com/embed/c4Xky6tlFyY?rel=0&VQ=HD720

                              Moon Phases 2022
      Video Credit: Data: [3]Lunar Reconnaissance Orbiter ; Animation:
                [4]NASA's [5]Scientific Visualization Studio;
    Music: Build the Future ([6]Universal Production Music), [7]Alexander
                                  Hitchens

   Explanation: What will the Moon phase be on your birthday this year? It
   is [8]hard to predict because the [9]Moon's appearance changes nightly.
   As the [10]Moon orbits the [11]Earth, the half illuminated by the
   [12]Sun first becomes increasingly visible, then decreasingly visible.
   The [13]featured video animates images and altitude data taken by
   NASA's Moon-orbiting [14]Lunar Reconnaissance Orbiter to show all 12
   lunations that appear this year, 2022 -- as seen from Earth's northern
   ([15]southern) hemisphere. A single [16]lunation describes one full
   cycle of our Moon, including all of its [17]phases. A full [18]lunation
   takes about 29.5 days, just under a month ([19]moon-th). As each
   [20]lunation progresses, sunlight reflects from the [21]Moon at
   different angles, and so [22]illuminates different features
   differently. During all of this, of course, the [23]Moon always keeps
   the same face toward the [24]Earth. What is less apparent
   night-to-night is that the [25]Moon's apparent size changes slightly,
   and that a slight wobble called a [26]libration occurs as the [27]Moon
   progresses along its [28]elliptical orbit.

                 Tomorrow's picture: to circle a dying star
     __________________________________________________________________

      [29]< | [30]Archive | [31]Submissions | [32]Index | [33]Search |
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     __________________________________________________________________

    Authors & editors: [40]Robert Nemiroff ([41]MTU) & [42]Jerry Bonnell
                                 ([43]UMCP)
          NASA Official: Phillip Newman [44]Specific rights apply.
              [45]NASA Web Privacy Policy and Important Notices
                A service of: [46]ASD at [47]NASA / [48]GSFC
                           & [49]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://www.youtube.com/embed/c4Xky6tlFyY?rel=0&VQ=HD720
   3. https://lunar.gsfc.nasa.gov/
   4. https://www.nasa.gov/
   5. https://svs.gsfc.nasa.gov/
   6. https://www.universalproductionmusic.com/
   7. https://www.universalproductionmusic.com/en-us/discover/composers/18423/alexander-hitchens
   8. https://vcahospitals.com/-/media/vca/images/lifelearn-images-foldered/10812/cognition2.jpg?la=en&hash=69D0BDA985281F5E7A93F87A8B783C90
   9. https://apod.nasa.gov/apod/ap160201.html
  10. https://solarsystem.nasa.gov/moons/earths-moon/overview/
  11. https://apod.nasa.gov/apod/ap070325.html
  12. https://en.wikipedia.org/wiki/Sun
  13. https://svs.gsfc.nasa.gov/4955
  14. https://lunar.gsfc.nasa.gov/about.html
  15. https://svs.gsfc.nasa.gov/4956
  16. https://en.wikipedia.org/wiki/Lunation
  17. https://spaceplace.nasa.gov/moon-phases/en/
  18. https://www.timeanddate.com/astronomy/moon/lunar-month.html
  19. https://spaceplace.nasa.gov/moon-phases/en/
  20. https://scienceworld.wolfram.com/astronomy/Lunation.html
  21. https://apod.nasa.gov/apod/moon.html
  22. https://apod.nasa.gov/apod/ap180522.html
  23. https://en.wikipedia.org/wiki/Moon
  24. https://apod.nasa.gov/apod/ap210905.html
  25. http://sten.astronomycafe.net/faqs/
  26. https://en.wikipedia.org/wiki/Libration
  27. https://apod.nasa.gov/apod/ap180318.html
  28. http://galileoandeinstein.phys.virginia.edu/more_stuff/Applets/Kepler/kepler.html
  29. https://apod.nasa.gov/apod/ap220131.html
  30. https://apod.nasa.gov/apod/archivepix.html
  31. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  32. https://apod.nasa.gov/apod/lib/aptree.html
  33. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  34. https://apod.nasa.gov/apod/calendar/allyears.html
  35. https://apod.nasa.gov/apod.rss
  36. https://apod.nasa.gov/apod/lib/edlinks.html
  37. https://apod.nasa.gov/apod/lib/about_apod.html
  38. http://asterisk.apod.com/discuss_apod.php?date=220201
  39. https://apod.nasa.gov/apod/ap220202.html
  40. http://www.phy.mtu.edu/faculty/Nemiroff.html
  41. http://www.phy.mtu.edu/
  42. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  43. http://www.astro.umd.edu/
  44. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  45. https://www.nasa.gov/about/highlights/HP_Privacy.html
  46. https://astrophysics.gsfc.nasa.gov/
  47. https://www.nasa.gov/
  48. https://www.nasa.gov/centers/goddard/
  49. http://www.mtu.edu/