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 January 1
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                            The Full Moon of 2021
            Image Credit & [3]Copyright: [4]Soumyadeep Mukherjee

   Explanation: Every Full Moon of 2021 shines in this year-spanning
   astrophoto project, a composite portrait of the familiar lunar nearside
   at each brightest [5]lunar phase. Arranged [6]by moonth, the year
   progresses in stripes beginning at the top. Taken with the same camera
   and lens the stripes are from Full Moon images all combined at the same
   pixel scale. The stripes still looked mismatched, but they show that
   the Full Moon's angular size changes throughout the year depending on
   its distance from Kolkata, India, planet Earth. [7]The calendar month,
   a full moon name, distance in kilometers, and angular size is indicated
   for each stripe. Angular size is given in minutes of arc corresponding
   to 1/60th of a degree. The largest Full Moon is [8]near a perigee or
   closest approach in May. The smallest is [9]near an apogee, the most
   distant Full Moon in December. Of course the full moons of [10]May and
   [11]November also slid into Earth's shadow during 2021's two lunar
   eclipses.

                    Tomorrow's picture: bright moon halos
     __________________________________________________________________

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    Authors & editors: [23]Robert Nemiroff ([24]MTU) & [25]Jerry Bonnell
                                 ([26]UMCP)
          NASA Official: Phillip Newman [27]Specific rights apply.
              [28]NASA Web Privacy Policy and Important Notices
                A service of: [29]ASD at [30]NASA / [31]GSFC
                           & [32]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2201/MoonstripsAnnotatedIG.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.instagram.com/soumyadeepmukherjeephotos/?hl=en
   5. https://moon.nasa.gov/moon-in-motion/moon-phases/
   6. https://apod.nasa.gov/apod/ap210111.html
   7. https://earthsky.org/moon-phases/2021-moon-phases-calendar-dates-and-times/
   8. https://apod.nasa.gov/apod/ap210430.html
   9. https://fourmilab.ch/earthview/pacalc.html
  10. https://apod.nasa.gov/apod/ap210528.html
  11. https://apod.nasa.gov/apod/ap211125.html
  12. https://apod.nasa.gov/apod/ap211231.html
  13. https://apod.nasa.gov/apod/archivepix.html
  14. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  15. https://apod.nasa.gov/apod/lib/aptree.html
  16. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  17. https://apod.nasa.gov/apod/calendar/allyears.html
  18. https://apod.nasa.gov/apod.rss
  19. https://apod.nasa.gov/apod/lib/edlinks.html
  20. https://apod.nasa.gov/apod/lib/about_apod.html
  21. http://asterisk.apod.com/discuss_apod.php?date=220101
  22. https://apod.nasa.gov/apod/ap220102.html
  23. http://www.phy.mtu.edu/faculty/Nemiroff.html
  24. http://www.phy.mtu.edu/
  25. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  26. http://www.astro.umd.edu/
  27. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  28. https://www.nasa.gov/about/highlights/HP_Privacy.html
  29. https://astrophysics.gsfc.nasa.gov/
  30. https://www.nasa.gov/
  31. https://www.nasa.gov/centers/goddard/
  32. http://www.mtu.edu/