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.

                                 2025 May 24
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                            Deimos Before Sunrise
                    Image Credit: [3]NASA, [4]JPL-Caltech

   Explanation: [5]Deimos takes 30 hours and 18 minutes to complete one
   orbit around the Red Planet. That's a little more than one Martian day
   or sol which is about 24 hours and 40 minutes long, so Deimos drifts
   westward across the Martian sky. About 15 kilometers across at its
   widest, the smallest of Mars' two moons is bright though. In fact
   Deimos is the brightest celestial object in [6]this Martian skyscape
   captured before sunrise by [7]Perseverance on March 1, the 1,433rd sol
   of the Mars rover's mission. The image is a composed of 16 exposures
   recorded by one of the rover's navigation cameras. The individual
   exposures were combined into a single image for an enhanced low light
   view. Regulus and Algeiba, bright stars in the constellation Leo, are
   also visible in the [8]dark Martian predawn sky.

                     Tomorrow's picture: beneath Jupiter
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    Authors & editors: [20]Robert Nemiroff ([21]MTU) & [22]Jerry Bonnell
                                 ([23]UMCP)
          NASA Official: Amber Straughn [24]Specific rights apply.
              [25]NASA Web Privacy Policy and Important Notices
                A service of: [26]ASD at [27]NASA / [28]GSFC,
                         [29]NASA Science Activation
                           & [30]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2505/PIA26556_2048.jpg
   3. https://www.nasa.gov/
   4. https://www.jpl.nasa.gov/
   5. https://science.nasa.gov/mars/moons/deimos/
   6. https://photojournal.jpl.nasa.gov/catalog/PIA26556
   7. https://science.nasa.gov/mission/mars-2020-perseverance/
   8. https://apod.nasa.gov/apod/image/2505/PIA26556_figA1024.jpg
   9. https://apod.nasa.gov/apod/ap250523.html
  10. https://apod.nasa.gov/apod/archivepix.html
  11. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  12. https://apod.nasa.gov/apod/lib/aptree.html
  13. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  14. https://apod.nasa.gov/apod/calendar/allyears.html
  15. https://apod.nasa.gov/apod.rss
  16. https://apod.nasa.gov/apod/lib/edlinks.html
  17. https://apod.nasa.gov/apod/lib/about_apod.html
  18. http://asterisk.apod.com/discuss_apod.php?date=250524
  19. https://apod.nasa.gov/apod/ap250525.html
  20. http://www.phy.mtu.edu/faculty/Nemiroff.html
  21. http://www.phy.mtu.edu/
  22. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  23. http://www.astro.umd.edu/
  24. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  25. https://www.nasa.gov/about/highlights/HP_Privacy.html
  26. https://astrophysics.gsfc.nasa.gov/
  27. https://www.nasa.gov/
  28. https://www.nasa.gov/centers/goddard/
  29. https://science.nasa.gov/learners
  30. http://www.mtu.edu/