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. 2022 August 6 [2]See Explanation. Clicking on the picture will download the highest resolution version available. Stereo Phobos Image Credit: [3]G. Neukum ([4]FU Berlin) et al., [5]Mars Express, [6]DLR, [7]ESA Explanation: Get out your red/blue glasses and float next to Phobos, grooved moon of Mars! Captured in 2004 by the High Resolution Stereo Camera on board ESA's Mars Express spacecraft, the image data was recorded at a distance of about 200 kilometers from the martian moon. This tantalizing [8]stereo anaglyph view shows the Mars-facing side of Phobos. It highlights the [9]asteroid-like moon's cratered and grooved surface. Up to hundreds of meters wide, the [10]mysterious grooves may be related to the impact that created [11]Stickney crater, the large crater at the left. Stickney crater is about 10 kilometers across, while [12]Phobos itself is only around 27 kilometers across at its widest point. Tomorrow's picture: a galaxy and a grain of sand __________________________________________________________________ [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]NASA Science Activation & [34]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2208/Phobos_stereoME_full.jpg 3. http://www.esa.int/esaSC/SEMGQOXLDMD_people_0_iv.html 4. http://www.fu-berlin.de/ 5. http://www.esa.int/export/SPECIALS/Mars_Express/SEMVQ95V9ED_0.html 6. https://www.dlr.de/EN/organisation-dlr/dlr/dlr-at-a-glance.html 7. http://www.esa.int/ 8. http://www.esa.int/SPECIALS/Mars_Express/SEM21TVJD1E_1.html#subhead2 9. https://solarsystem.nasa.gov/moons/mars-moons/phobos/in-depth/ 10. https://earthsky.org/space/new-evidence-supports-theory-to-explain-odd-grooves-on-mars-moon-phobos/ 11. https://apod.nasa.gov/apod/ap180505.html 12. https://apod.nasa.gov/apod/ap220703.html 13. https://apod.nasa.gov/apod/ap220805.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=220806 23. https://apod.nasa.gov/apod/ap220807.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. https://science.nasa.gov/learners 34. http://www.mtu.edu/