            APOD: 2018 May 14 - Saturns Hyperion in Natural Color

                         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 May 14
                                      [2]
                      Saturn's Hyperion in Natural Color
    Image Credit & License [3] : NASA [4] / JPL [5] / SSI [6] ; Composition:
                             Gordan Ugarkovic [7]

Explanation: What lies at the bottom of Hyperion [8] 's strange craters? To
help find out, the robot Cassini spacecraft [9]  now orbiting Saturn [10]
swooped [11]  past the sponge-textured moon [12]  in 2005 and 2010 [13]  and
took images of unprecedented detail. A six-image mosaic [14]  from the 2005
pass, featured here [15]  in natural color, shows a remarkable world strewn
with strange craters and an odd sponge-like surface [16] . At the bottom of
most craters lies some type of unknown dark reddish material [17] . This
material appears similar to that covering part of another of Saturn's moons,
Iapetus [18] , and might sink into the ice moon [19]  as it better absorbs
warming sunlight [20] . Hyperion [21] is about 250 kilometers across, rotates
chaotically [22] , and has a density so low that it likely houses [23] a vast
system of caverns [24]  inside.

                  Tomorrow's picture: Hofgasse 7, Linz [25]

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    Authors & editors: Robert Nemiroff [37] (MTU [38] ) & Jerry Bonnell [39]
                                  (UMCP [40] )
          NASA Official:  Phillip Newman Specific rights apply [41] .
              NASA Web Privacy Policy and Important Notices [42]
              A service of: ASD [43]  at NASA [44]  / GSFC [45]
                           & Michigan Tech. U. [46]
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Site notes:
  [1] archivepix.html
  [2] image/1805/HyperionTrue_CassiniUgarkovic_1800.jpg
  [3] https://creativecommons.org/licenses/by-nc-sa/2.0/
  [4] http://www.nasa.gov/
  [5] http://www.jpl.nasa.gov/
  [6] http://www.spacescience.org/
  [7] http://www.flickr.com/photos/ugordan
  [8] http://en.wikipedia.org/wiki/Hyperion_(moon)
  [9] http://www.nasa.gov/mission_pages/cassini/spacecraft/index.html
  [10] http://en.wikipedia.org/wiki/Saturn_(planet)
  [11] http://photojournal.jpl.nasa.gov/catalog/PIA07742
  [12] ap150603.html
  [13] http://www.youtube.com/watch?v=U5VfYDYL3rA
  [14] https://photojournal.jpl.nasa.gov/catalog/PIA07761
  [15] https://www.flickr.com/photos/ugordan/221141517/in/dateposted/
  [16] http://www.youtube.com/watch?v=30pH8Xn41Os
  [17] http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1541.pdf
  [18] ap120113.html
  [19] http://sci.esa.int/cassini-huygens/54778-saturnian-moon-hyperion/
  [20] https://www.pinterest.com/pin/491173903088738005/
  [21] https://solarsystem.nasa.gov/moons/saturn-moons/hyperion/in-depth/
  [22] http://www.youtube.com/watch?v=zgFYy0APTg0
  [23] http://adsabs.harvard.edu/abs/2010DPS....42.0603H
  [24] http://en.wikipedia.org/wiki/Cave
  [25] ap180515.html
  [26] ap180513.html
  [27] archivepix.html
  [28] lib/apsubmit2015.html
  [29] lib/aptree.html
  [30] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [31] calendar/allyears.html
  [32] /apod.rss
  [33] lib/edlinks.html
  [34] lib/about_apod.html
  [35] http://asterisk.apod.com/discuss_apod.php?date=180514
  [36] ap180515.html
  [37] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [38] http://www.phy.mtu.edu/
  [39] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [40] http://www.astro.umd.edu/
  [41] lib/about_apod.html#srapply
  [42] https://www.nasa.gov/about/highlights/HP_Privacy.html
  [43] https://astrophysics.gsfc.nasa.gov/
  [44] https://www.nasa.gov/
  [45] https://www.nasa.gov/centers/goddard/
  [46] http://www.mtu.edu/
