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.

                               2019 February 17
                                      [2]
                          Shadow of a Martian Robot
    Image Credit: Mars Exploration Rover Mission [3] , JPL [4] , NASA [5]

Explanation: What if you saw your shadow on Mars and it wasn't human [6] ?
Then you might be the Opportunity rover [7] currently exploring Mars.
Opportunity explored the red planet [8]  from 2004 to 2018, finding evidence
of ancient water [9] , and sending breathtaking images across the inner Solar
System [10] . Pictured here [11]  in 2004, Opportunity [12]  looks opposite
the Sun into Endurance Crater [13]  and sees its own shadow [14] . Two wheels
are visible on the lower left and right, while the floor and walls of the
unusual crater are visible [15]  in the background. Caught in a dust storm in
2018 [16] , last week NASA stopped try contact Opportunity [17] and declare
the ground-breaking mission [18] , originally planned for only 92 days,
complete [19] .

                        Tomorrow's picture: sky dragon

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    Authors & editors: Robert Nemiroff [31] (MTU [32] ) & Jerry Bonnell [33]
                                  (UMCP [34] )
          NASA Official:  Phillip Newman Specific rights apply [35] .
              NASA Web Privacy Policy and Important Notices [36]
              A service of: ASD [37]  at NASA [38]  / GSFC [39]
                           & Michigan Tech. U. [40]
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Site notes:
  [1] archivepix.html
  [2] image/1902/marsshadow_opportunity_1024.jpg
  [3] https://mars.nasa.gov/mer/index.cfm
  [4] https://www.jpl.nasa.gov/
  [5] https://www.nasa.gov/
  [6] ap160815.html
  [7] https://mars.nasa.gov/mer/mission/overview/
  [8] https://solarsystem.nasa.gov/planets/mars/ove...
  [9] ap040303.html
  [10] http://en.wikipedia.org/wiki/Solar_system
  [11] http://www.jpl.nasa.gov/missions/mer/images.c...
  [12]
https://mars.nasa.gov/news/8414/
six-things-to-know-about-nasas-opportunity-rover/
  [13] ap040510.html
  [14] ap990830.html
  [15] http://photojournal.jpl.nasa.gov/catalog/PIA0...
  [16] ap190215.html
  [17] https://youtu.be/1Ll-VHYxWXU
  [18] https://en.wikipedia.org/wiki/Pun
  [19]
https://mars.nasa.gov/news/8413/
nasas-opportunity-rover-mission-on-mars-comes-to-end/
  [20] ap190216.html
  [21] archivepix.html
  [22] lib/apsubmit2015.html
  [23] lib/aptree.html
  [24] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apo...
  [25] calendar/allyears.html
  [26] /apod.rss
  [27] lib/edlinks.html
  [28] lib/about_apod.html
  [29] http://asterisk.apod.com/discuss_apod.php?dat...
  [30] ap190218.html
  [31] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [32] http://www.phy.mtu.edu/
  [33] https://antwrp.gsfc.nasa.gov/htmltest/jbonnel...
  [34] http://www.astro.umd.edu/
  [35] lib/about_apod.html#srapply
  [36] https://www.nasa.gov/about/highlights/HP_Priv...
  [37] https://astrophysics.gsfc.nasa.gov/
  [38] https://www.nasa.gov/
  [39] https://www.nasa.gov/centers/goddard/
  [40] http://www.mtu.edu/

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