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 October 3
    [2]The featured image shows a partly illuminated light-colored sphere
   with a complex pattern of brown streaks. Please see the explanation for
                         more detailed information.

                    Jupiter's Europa from Spacecraft Juno
    Image Credit & [3]License: [4]NASA, [5]JPL-Caltech, [6]SwRI, [7]MSSS;
                         Processing: [8]Andrea Luck

   Explanation: What mysteries might be solved by peering into this
   crystal ball? In this case, the ball is actually a moon of [9]Jupiter,
   the crystals are ice, and the moon is not only dirty but cracked
   [10]beyond repair. Nevertheless, speculation is rampant that oceans
   exist under [11]Europa's fractured ice-plains that [12]could support
   life. Europa, roughly the [13]size of [14]Earth's Moon, is [15]pictured
   here in an image taken [16]a few days ago when the Jupiter-orbiting
   robotic [17]spacecraft Juno passed within 325 kilometers of its
   [18]streaked and [19]shifting surface. Underground [20]oceans are
   thought likely because [21]Europa undergoes [22]global flexing due to
   its changing gravitational attraction with Jupiter during its slightly
   [23]elliptical orbit, and this flexing heats the interior. Studying
   Juno's [24]close-up images may further humanity's understanding not
   only of Europa and the [25]early Solar System but also of the
   possibility that [26]life exists elsewhere in the universe.

                        Tomorrow's picture: big eagle
     __________________________________________________________________

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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/2210/Europa_JunoLuck_2611.jpg
   3. https://creativecommons.org/licenses/by/2.0/
   4. https://www.nasa.gov/
   5. https://www.jpl.nasa.gov/
   6. https://www.swri.org/
   7. http://www.msss.com/
   8. https://twitter.com/andrluck
   9. https://solarsystem.nasa.gov/planets/jupiter/in-depth/
  10. http://i.imgur.com/XWMxDa9.jpg
  11. https://en.wikipedia.org/wiki/Europa_(moon)
  12. https://www.jpl.nasa.gov/videos/alien-ocean-nasas-mission-to-europa
  13. http://georgenet.net/hubble/images/moons.jpg
  14. https://apod.nasa.gov/apod/ap130716.html
  15. https://www.flickr.com/photos/192271236@N03/52393304986/in/pool-apods/
  16. https://www.nasa.gov/feature/jpl/nasa-s-juno-shares-first-image-from-flyby-of-jupiter-s-moon-europa
  17. https://www.nasa.gov/mission_pages/juno/spacecraft/index.html
  18. https://apod.nasa.gov/apod/ap961022.html
  19. https://apod.nasa.gov/apod/ap000825.html
  20. https://en.wikipedia.org/wiki/Europa_(moon)#Subsurface_ocean
  21. https://solarsystem.nasa.gov/moons/jupiter-moons/europa/in-depth/
  22. https://youtu.be/F5SdOYEniCo
  23. https://www.nasa.gov/audience/forstudents/5-8/features/nasa-knows/what-is-orbit-58.html
  24. https://apod.nasa.gov/apod/ap020602.html
  25. https://en.wikipedia.org/wiki/Formation_and_evolution_of_the_Solar_System
  26. http://www.nasa.gov/content/finding-life-beyond-earth-is-within-reach
  27. https://apod.nasa.gov/apod/ap221002.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. http://asterisk.apod.com/discuss_apod.php?date=221003
  37. https://apod.nasa.gov/apod/ap221004.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/