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.

                               2019 November 3
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                       Daphnis and the Rings of Saturn
     Image Credit: [3]NASA, [4]JPL-Caltech, [5]Space Science Institute,
                                 [6]Cassini

   Explanation: What's happening to the rings of Saturn? A little moon
   making big waves. The moon is 8-kilometer [7]Daphnis and it is making
   waves in the [8]Keeler Gap of [9]Saturn's rings using just its gravity
   -- as it [10]bobs up and down, in and out. The [11]featured image is a
   colored and more detailed version of a [12]previously released
   [13]images taken in 2017 by the robotic [14]Cassini spacecraft during
   one of its [15]Grand Finale [16]orbits. [17]Daphnis can be seen on the
   far right, sporting ridges likely accumulated from [18]ring particles.
   [19]Daphnis was discovered in Cassini images in 2005 and raised mounds
   of ring particles so high in 2009 -- during [20]Saturn's equinox when
   the ring plane pointed directly at the Sun -- that they [21]cast
   notable shadows.

               Tomorrow's picture: turmoil in a stellar lagoon
     __________________________________________________________________

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     __________________________________________________________________

    Authors & editors: [33]Robert Nemiroff ([34]MTU) & [35]Jerry Bonnell
                                 ([36]UMCP)
          NASA Official: Phillip Newman [37]Specific rights apply.
              [38]NASA Web Privacy Policy and Important Notices
                A service of: [39]ASD at [40]NASA / [41]GSFC
                           & [42]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/1911/DaphnisRings_Cassini_2328.jpg
   3. https://www.nasa.gov/
   4. http://www.jpl.nasa.gov/
   5. http://www.spacescience.org/index.php
   6. https://solarsystem.nasa.gov/missions/cassini/mission/quick-facts/
   7. https://en.wikipedia.org/wiki/Daphnis_(moon)
   8. https://en.wikipedia.org/wiki/Rings_of_Saturn#Keeler_Gap
   9. http://solarsystem.nasa.gov/planets/Saturn
  10. https://www.youtube.com/watch?v=Snr73Og3Rbk
  11. https://photojournal.jpl.nasa.gov/catalog/PIA23167
  12. https://apod.nasa.gov/apod/ap170121.html
  13. https://apod.nasa.gov/apod/ap170121.html
  14. https://solarsystem.nasa.gov/missions/cassini/the-journey/the-spacecraft/
  15. https://solarsystem.nasa.gov/missions/cassini/mission/grand-finale/overview/
  16. https://apod.nasa.gov/apod/ap170125.html
  17. https://solarsystem.nasa.gov/moons/saturn-moons/daphnis/in-depth/
  18. https://en.wikipedia.org/wiki/Rings_of_Saturn#/media/File:Saturn_Ring_Material.jpg
  19. http://solarsystem.nasa.gov/planets/daphnis
  20. https://apod.nasa.gov/apod/ap090901.html
  21. http://photojournal.jpl.nasa.gov/catalog/PIA11656
  22. https://apod.nasa.gov/apod/ap191102.html
  23. https://apod.nasa.gov/apod/archivepix.html
  24. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  25. https://apod.nasa.gov/apod/lib/aptree.html
  26. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  27. https://apod.nasa.gov/apod/calendar/allyears.html
  28. https://apod.nasa.gov/apod.rss
  29. https://apod.nasa.gov/apod/lib/edlinks.html
  30. https://apod.nasa.gov/apod/lib/about_apod.html
  31. http://asterisk.apod.com/discuss_apod.php?date=191103
  32. https://apod.nasa.gov/apod/ap191104.html
  33. http://www.phy.mtu.edu/faculty/Nemiroff.html
  34. http://www.phy.mtu.edu/
  35. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  36. http://www.astro.umd.edu/
  37. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  38. https://www.nasa.gov/about/highlights/HP_Privacy.html
  39. https://astrophysics.gsfc.nasa.gov/
  40. https://www.nasa.gov/
  41. https://www.nasa.gov/centers/goddard/
  42. http://www.mtu.edu/