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.

                                2023 April 4
    [2]A large orange volcano is pictured on Mars from above. Please see
               the explanation for more detailed information.

              Olympus Mons: Largest Volcano in the Solar System
   Image Credit: [3]ESA, [4]DLR, [5]FU Berlin, [6]Mars Express; Processing
                   & [7]CC BY 2.0 License: [8]Andrea Luck

   Explanation: The largest volcano in our Solar System is on Mars.
   Although three times higher than Earth's [9]Mount Everest, [10]Olympus
   Mons will not be difficult for [11]humans to climb because of the
   volcano's shallow slopes and Mars' low gravity. Covering an area
   greater than the entire [12]Hawaiian volcano chain, the slopes of
   [13]Olympus Mons typically rise only a few degrees at a time.
   [14]Olympus Mons is an immense [15]shield volcano, built long ago by
   fluid lava. A [16]relatively static surface crust allowed it to build
   up over time. Its last [17]eruption is thought to have been about 25
   million years ago. The [18]featured image was taken by the European
   Space Agency's robotic [19]Mars Express spacecraft currently orbiting
   the [20]Red Planet.

   Your Sky Surprise: [21]What picture did APOD feature on your birthday?
                                 (post 1995)
                       Tomorrow's picture: open space
     __________________________________________________________________

      [22]< | [23]Archive | [24]Submissions | [25]Index | [26]Search |
   [27]Calendar | [28]RSS | [29]Education | [30]About APOD | [31]Discuss |
                                    [32]>
     __________________________________________________________________

    Authors & editors: [33]Robert Nemiroff ([34]MTU) & [35]Jerry Bonnell
                                 ([36]UMCP)
          NASA Official: Phillip Newman [37]Specific rights apply.
              [38]NASA Web Privacy Policy and Important Notices
                A service of: [39]ASD at [40]NASA / [41]GSFC,
                         [42]NASA Science Activation
                           & [43]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2304/OlympusMons_MarsExpress_6000.jpg
   3. https://www.esa.int/
   4. https://www.dlr.de/EN/organisation-dlr/dlr/dlr-at-a-glance.html
   5. https://www.fu-berlin.de/
   6. https://www.esa.int/Science_Exploration/Space_Science/Mars_Express
   7. https://creativecommons.org/licenses/by/2.0/
   8. https://twitter.com/andrluck
   9. https://apod.nasa.gov/apod/ap110417.html
  10. https://mars.nasa.gov/gallery/atlas/olympus-mons.html
  11. https://apod.nasa.gov/apod/ap230326.html
  12. https://apod.nasa.gov/apod/ap951216.html
  13. https://youtu.be/QXpzNNARzGI
  14. https://en.wikipedia.org/wiki/Olympus_Mons
  15. https://www.nps.gov/articles/000/shield-volcanoes.htm
  16. https://www.rd.com/wp-content/uploads/2020/06/GettyImages-845712410.jpg
  17. https://spaceplace.nasa.gov/volcanoes2/
  18. https://www.flickr.com/photos/192271236@N03/52770375578/in/pool-apods/
  19. https://en.wikipedia.org/wiki/Mars_Express
  20. https://www.nasa.gov/feature/goddard/2021/nasa-confirms-thousands-of-massive-ancient-volcanic-eruptions-on-mars
  21. https://apod.nasa.gov/apod/calendar/allyears.html
  22. https://apod.nasa.gov/apod/ap230403.html
  23. https://apod.nasa.gov/apod/archivepix.html
  24. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  25. https://apod.nasa.gov/apod/lib/aptree.html
  26. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  27. https://apod.nasa.gov/apod/calendar/allyears.html
  28. https://apod.nasa.gov/apod.rss
  29. https://apod.nasa.gov/apod/lib/edlinks.html
  30. https://apod.nasa.gov/apod/lib/about_apod.html
  31. https://asterisk.apod.com/discuss_apod.php?date=230404
  32. https://apod.nasa.gov/apod/ap230405.html
  33. http://www.phy.mtu.edu/faculty/Nemiroff.html
  34. http://www.phy.mtu.edu/
  35. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  36. http://www.astro.umd.edu/
  37. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  38. https://www.nasa.gov/about/highlights/HP_Privacy.html
  39. https://astrophysics.gsfc.nasa.gov/
  40. https://www.nasa.gov/
  41. https://www.nasa.gov/centers/goddard/
  42. https://science.nasa.gov/learners
  43. http://www.mtu.edu/