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.

                              2024 November 10
      [2]A picture of Mars is shown as a large orange globe. Across the
        center of the planet a long canyon is visible. Please see the
                 explanation for more detailed information.

                 Valles Marineris: The Grand Canyon of Mars
              Image Credit: [3]NASA, [4]USGS, [5]Viking Project

   Explanation: The largest canyon in the [6]Solar System cuts a wide
   swath across the face of [7]Mars. Named [8]Valles Marineris, the grand
   valley extends over 3,000 kilometers long, spans as much as 600
   kilometers across, and delves as much as 8 kilometers deep. By
   comparison, the [9]Earth's Grand Canyon in Arizona, USA is 800
   kilometers long, 30 kilometers across, and 1.8 kilometers deep. The
   origin of the [10]Valles Marineris remains [11]unknown, although a
   leading hypothesis holds that it started as a [12]crack billions of
   years ago as the planet cooled. Several geologic processes have been
   identified in [13]the canyon. The [14]featured mosaic was [15]created
   from over 100 images of [16]Mars taken by [17]Viking Orbiters in the
   1970s.

                       Tomorrow's picture: comet tails
     __________________________________________________________________

      [18]< | [19]Archive | [20]Submissions | [21]Index | [22]Search |
   [23]Calendar | [24]RSS | [25]Education | [26]About APOD | [27]Discuss |
                                    [28]>
     __________________________________________________________________

    Authors & editors: [29]Robert Nemiroff ([30]MTU) & [31]Jerry Bonnell
                                 ([32]UMCP)
          NASA Official: Amber Straughn [33]Specific rights apply.
            [34]NASA Web Privacy, [35]Accessibility, [36]Notices;
                A service of: [37]ASD at [38]NASA / [39]GSFC,
                         [40]NASA Science Activation
                           & [41]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2411/marsglobe_viking_1552.jpg
   3. https://www.nasa.gov/
   4. https://www.usgs.gov/
   5. https://science.nasa.gov/mission/viking/
   6. https://science.nasa.gov/solar-system/
   7. https://science.nasa.gov/mars/
   8. https://youtu.be/JUbQM47QXwQ
   9. https://en.wikipedia.org/wiki/Grand_Canyon
  10. https://en.wikipedia.org/wiki/Valles_Marineris
  11. https://vignette1.wikia.nocookie.net/theevilliouschronicles/images/8/85/Confused-cat.jpg
  12. https://apod.nasa.gov/apod/ap980310.html
  13. https://science.nasa.gov/resource/valles-marineris-the-grand-canyon-of-mars/
  14. http://nssdc.gsfc.nasa.gov/photo_gallery/photogallery-mars.html
  15. http://nssdc.gsfc.nasa.gov/photo_gallery/caption/marsglobe1.txt
  16. https://science.nasa.gov/mars/facts/
  17. https://science.nasa.gov/mission/viking/spacecraft-and-science/
  18. https://apod.nasa.gov/apod/ap241109.html
  19. https://apod.nasa.gov/apod/archivepix.html
  20. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  21. https://apod.nasa.gov/apod/lib/aptree.html
  22. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  23. https://apod.nasa.gov/apod/calendar/allyears.html
  24. https://apod.com/feed.rss
  25. https://apod.nasa.gov/apod/lib/edlinks.html
  26. https://apod.nasa.gov/apod/lib/about_apod.html
  27. https://asterisk.apod.com/discuss_apod.php?date=241110
  28. https://apod.nasa.gov/apod/ap241111.html
  29. http://www.phy.mtu.edu/faculty/Nemiroff.html
  30. http://www.phy.mtu.edu/
  31. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  32. http://www.astro.umd.edu/
  33. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  34. https://www.nasa.gov/about/highlights/HP_Privacy.html
  35. https://www.nasa.gov/general/accessibility/
  36. https://www.nasa.gov/privacy/
  37. https://astrophysics.gsfc.nasa.gov/
  38. https://www.nasa.gov/
  39. https://www.nasa.gov/centers/goddard/
  40. https://science.nasa.gov/learners
  41. http://www.mtu.edu/