Astronomy Picture of the Day

                         Astronomy Picture of the Day

    Discover the cosmos! [1] Each day a different image or photograph of our
 fascinating universe is featured, along with a brief explanation written by a
                           professional astronomer.

                               2018 November 21
                                      [2]
                    Swirls and Colors on Jupiter from Juno
Image Credit: NASA [3] , Juno [4] , SwRI [5] , MSSS [6] ; Processing & License
                    [7] : Matt Brealey [8] , Seán Doran [9]

Explanation: What creates the colors in Jupiter's clouds? No one is sure. The
thick atmosphere of Jupiter [10] is mostly hydrogen [11]  and helium [12] ,
elements which are colorless at the low temperatures of the Jovian cloud tops
[13] . Which trace elements provide the colors remains a topic of research
[14] , although small amounts of ammonium hydrosulfide [15]  are one leading
candidate [16] . What is clear from the featured color-enhanced image [17]  --
and many similar images -- is that lighter clouds are typically higher up than
darker ones. Pictured, light clouds swirl [18]  around reddish regions [19]
toward the lower right, while they appear to cover over some darker domains on
the upper right. The featured image was taken by the robotic Juno [20]
spacecraft during its 14th low pass over Jupiter [21] earlier this year. Juno
[22]  continues in its looping elliptical orbit, swooping near the huge planet
[23] every 53 days and exploring a slightly different sector each time around.

                Tomorrow's picture: munching on dark globules

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    Authors & editors: Robert Nemiroff [35] (MTU [36] ) & Jerry Bonnell [37]
                                  (UMCP [38] )
          NASA Official:  Phillip Newman Specific rights apply [39] .
              NASA Web Privacy Policy and Important Notices [40]
              A service of: ASD [41]  at NASA [42]  / GSFC [43]
                           & Michigan Tech. U. [44]
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Site notes:
  [1] archivepix.html
  [2] image/1811/JupiterSwirls_JunoBrealey_3709.jpg
  [3] https://www.nasa.gov/
  [4] https://www.nasa.gov/mission_pages/juno/main/index.html
  [5] http://www.swri.org/
  [6] http://www.msss.com/
  [7] https://creativecommons.org/licenses/by-nc/3.0/
  [8]
http://www.planetary.org/explore/space-topics/space-imaging/profiles/
matt-brealey.html
  [9] https://www.flickr.com/photos/seandoran/
  [10] https://solarsystem.nasa.gov/planets/jupiter/overview/
  [11] https://en.wikipedia.org/wiki/Hydrogen
  [12] https://education.jlab.org/itselemental/ele002.html
  [13] https://en.wikipedia.org/wiki/Atmosphere_of_Jupiter
  [14]
http://2.bp.blogspot.com/-9F6bOIK7R-A/T3IHV6JBmWI/AAAAAAAALKU/Mib41Ua5Ujs/
s1600/Dog_teacher.jpg
  [15] https://en.wikipedia.org/wiki/Ammonium_hydrosulfide
  [16] http://adsabs.harvard.edu/abs/2018Icar..302..418L
  [17]
http://www.planetary.org/multimedia/space-images/jupiter/
swirls-and-vortices.html
  [18] https://www.missionjuno.swri.edu/news/chaotic-clouds-of-jupiter
  [19] ap171214.html
  [20] https://www.nasa.gov/mission_pages/juno/main/index.html
  [21] https://youtu.be/qV_2y-BLEr4
  [22] https://en.wikipedia.org/wiki/Juno_(spacecraft)
  [23] ap180226.html
  [24] ap181120.html
  [25] archivepix.html
  [26] lib/apsubmit2015.html
  [27] lib/aptree.html
  [28] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [29] calendar/allyears.html
  [30] /apod.rss
  [31] lib/edlinks.html
  [32] lib/about_apod.html
  [33] http://asterisk.apod.com/discuss_apod.php?date=181121
  [34] ap181122.html
  [35] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [36] http://www.phy.mtu.edu/
  [37] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [38] http://www.astro.umd.edu/
  [39] lib/about_apod.html#srapply
  [40] https://www.nasa.gov/about/highlights/HP_Privacy.html
  [41] https://astrophysics.gsfc.nasa.gov/
  [42] https://www.nasa.gov/
  [43] https://www.nasa.gov/centers/goddard/
  [44] http://www.mtu.edu/

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