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 December 11

         IFRAME: [2]https://www.youtube.com/embed/JqH0diwqcUM?rel=0

                     Solar Minimum versus Solar Maximum
                    Video Credit: [3]NASA, [4]SDO, [5]SVS

   Explanation: The surface of our Sun is constantly changing. Some years
   it is quiet, showing relatively few sunspots and active regions. Other
   years it is churning, showing many [6]sunspots and throwing frequent
   [7]Coronal Mass Ejections (CMEs) and [8]flares. Reacting to
   [9]magnetism, our Sun's surface goes through periods of relative calm,
   called Solar Minimum and relative unrest, called Solar Maximum, every
   11 years. The [10]featured video shows on the left a month in late 2019
   when the [11]Sun was near [12]Solar Minimum, while on the right a month
   in 2014 when near [13]Solar Maximum. The video was taken by NASA's
   [14]Solar Dynamic Observatory in far [15]ultraviolet light. Our [16]Sun
   is progressing again toward [17]Solar Maximum in 2025, but displaying
   even now a surface with a [18]surprisingly high amount of activity.

     Night Sky Network webinar: [19]APOD editor to review coolest space
                               images of 2023
                    Tomorrow's picture: double sky arches
     __________________________________________________________________

      [20]< | [21]Archive | [22]Submissions | [23]Index | [24]Search |
   [25]Calendar | [26]RSS | [27]Education | [28]About APOD | [29]Discuss |
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     __________________________________________________________________

    Authors & editors: [31]Robert Nemiroff ([32]MTU) & [33]Jerry Bonnell
                                 ([34]UMCP)
          NASA Official: Phillip Newman [35]Specific rights apply.
              [36]NASA Web Privacy Policy and Important Notices
                A service of: [37]ASD at [38]NASA / [39]GSFC,
                         [40]NASA Science Activation
                           & [41]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://www.youtube.com/embed/JqH0diwqcUM?rel=0
   3. https://www.nasa.gov/
   4. https://sdo.gsfc.nasa.gov/
   5. https://svs.gsfc.nasa.gov/
   6. https://apod.nasa.gov/apod/ap230517.html
   7. https://www.nasa.gov/image-article/what-coronal-mass-ejection-or-cme/
   8. https://apod.nasa.gov/apod/ap180902.html
   9. https://www.nasa.gov/science-research/heliophysics/nasa-understanding-the-magnetic-sun/
  10. https://svs.gsfc.nasa.gov/13714/
  11. https://spaceplace.nasa.gov/menu/sun/
  12. https://apod.nasa.gov/apod/ap191028.html
  13. https://apod.nasa.gov/apod/ap071203.html
  14. https://sdo.gsfc.nasa.gov/
  15. https://science.nasa.gov/ems/10_ultravioletwaves/
  16. https://en.wikipedia.org/wiki/Sun
  17. https://www.nasa.gov/news-release/solar-cycle-25-is-here-nasa-noaa-scientists-explain-what-that-means/
  18. https://images.pexels.com/photos/7140633/pexels-photo-7140633.jpeg
  19. https://www.youtube.com/watch?v=S00SNpSNKZo
  20. https://apod.nasa.gov/apod/ap231210.html
  21. https://apod.nasa.gov/apod/archivepix.html
  22. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  23. https://apod.nasa.gov/apod/lib/aptree.html
  24. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  25. https://apod.nasa.gov/apod/calendar/allyears.html
  26. https://apod.com/feed.rss
  27. https://apod.nasa.gov/apod/lib/edlinks.html
  28. https://apod.nasa.gov/apod/lib/about_apod.html
  29. https://asterisk.apod.com/discuss_apod.php?date=231211
  30. https://apod.nasa.gov/apod/ap231212.html
  31. http://www.phy.mtu.edu/faculty/Nemiroff.html
  32. http://www.phy.mtu.edu/
  33. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  34. http://www.astro.umd.edu/
  35. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  36. https://www.nasa.gov/about/highlights/HP_Privacy.html
  37. https://astrophysics.gsfc.nasa.gov/
  38. https://www.nasa.gov/
  39. https://www.nasa.gov/centers/goddard/
  40. https://science.nasa.gov/learners
  41. http://www.mtu.edu/