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.

                               2020 August 29
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                             Martian Chiaroscuro
        Image Credit: [3]HiRISE, [4]MRO, [5]LPL (U. Arizona), [6]NASA

   Explanation: [7]Deep shadows create dramatic contrasts between light
   and dark in [8]this high-resolution close-up of the martian surface.
   Recorded on January 24, 2014 by the HiRISE camera on board the [9]Mars
   Reconnaissance Orbiter, the scene spans about 1.5 kilometers. From 250
   kilometers above the Red Planet the camera is looking down at a sand
   dune field in a southern highlands crater. Captured when the Sun was
   about 5 degrees above the local horizon, only the dune crests were
   caught in full sunlight. A long, cold winter was coming to the southern
   hemisphere and bright ridges of [10]seasonal frost line the martian
   dunes. The Mars Reconnaissance Orbiter, [11]one of the oldest operating
   spacecraft at the Red Planet, celebrated the 15th anniversary of its
   launch from planet Earth [12]on August 12.

                 Tomorrow's picture: cathedral to the stars
     __________________________________________________________________

      [13]< | [14]Archive | [15]Submissions | [16]Index | [17]Search |
   [18]Calendar | [19]RSS | [20]Education | [21]About APOD | [22]Discuss |
                                    [23]>
     __________________________________________________________________

    Authors & editors: [24]Robert Nemiroff ([25]MTU) & [26]Jerry Bonnell
                                 ([27]UMCP)
          NASA Official: Phillip Newman [28]Specific rights apply.
              [29]NASA Web Privacy Policy and Important Notices
                A service of: [30]ASD at [31]NASA / [32]GSFC
                           & [33]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2008/marsHirise_ESP_035143_1325.jpg
   3. http://hirise.lpl.arizona.edu/
   4. http://mars.jpl.nasa.gov/mro/
   5. http://www.lpl.arizona.edu/
   6. http://www.nasa.gov/
   7. http://en.wikipedia.org/wiki/Chiaroscuro
   8. http://hirise.lpl.arizona.edu/ESP_035143_1325
   9. https://www.nasa.gov/mission_pages/MRO/main/index.html
  10. http://www.planetary.org/explore/space-topics/mars/mars-calendar.html
  11. https://www.nasa.gov/feature/jpl/nasas-mars-reconnaissance-orbiter-undergoes-memory-update
  12. https://www.nasa.gov/feature/jpl/celebrate-mars-reconnaissance-orbiters-views-from-above
  13. https://apod.nasa.gov/apod/ap200828.html
  14. https://apod.nasa.gov/apod/archivepix.html
  15. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  16. https://apod.nasa.gov/apod/lib/aptree.html
  17. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  18. https://apod.nasa.gov/apod/calendar/allyears.html
  19. https://apod.nasa.gov/apod.rss
  20. https://apod.nasa.gov/apod/lib/edlinks.html
  21. https://apod.nasa.gov/apod/lib/about_apod.html
  22. http://asterisk.apod.com/discuss_apod.php?date=200829
  23. https://apod.nasa.gov/apod/ap200830.html
  24. http://www.phy.mtu.edu/faculty/Nemiroff.html
  25. http://www.phy.mtu.edu/
  26. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  27. http://www.astro.umd.edu/
  28. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  29. https://www.nasa.gov/about/highlights/HP_Privacy.html
  30. https://astrophysics.gsfc.nasa.gov/
  31. https://www.nasa.gov/
  32. https://www.nasa.gov/centers/goddard/
  33. http://www.mtu.edu/