Subj : Daily APOD Report To : All From : Ben Ritchey Date : Wed Nov 21 2018 08:40:44 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 ------------------------------------------------------------------------------- < [24] | Archive [25] | Submissions [26] | Index [27] | Search [28] | Calendar [29] | RSS [30] | Education [31] | About APOD [32] | Discuss [33] | > [34] ------------------------------------------------------------------------------- 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] ---------- 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/ --- Mystic BBS v1.12 A39 (Windows/32) * Origin: FIDONet - The Positronium Repository (1:393/68) .