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. 2021 July 4 [2]The picture shows a Martian rock formation nicknamed the Face on Mars. Please see the explanation for more detailed information. The Face on Mars Image Credit: [3]NASA, [4]Viking 1 Orbiter Explanation: Wouldn't it be fun if [5]clouds were [6]castles? Wouldn't it be fun if the [7]laundry on the bedroom chair was a [8]superhero? Wouldn't it be fun if [9]rock [10]mesas on [11]Mars were interplanetary monuments to the human face? [12]Clouds, though, are floating droplets of water and ice. Laundry is cotton, wool, or plastic, woven into garments. Famous Martian rock mesas known by names like the [13]Face on Mars appear quite natural when [14]seen more clearly on [15]better images. Is [16]reality boring? Nobody knows [17]why some clouds make rain. Nobody knows if [18]life ever developed on Mars. Nobody knows why the laundry on the bedroom chair [19]smells like root beer. Scientific [20]exploration can not only resolve mysteries, but uncover [21]new knowledge, greater mysteries, and [22]yet deeper questions. As [23]humanity explores our universe, perhaps fun -- [24]through discovery -- [25]is just beginning. Tomorrow's picture: horse of blue __________________________________________________________________ [26]< | [27]Archive | [28]Submissions | [29]Index | [30]Search | [31]Calendar | [32]RSS | [33]Education | [34]About APOD | [35]Discuss | [36]> __________________________________________________________________ Authors & editors: [37]Robert Nemiroff ([38]MTU) & [39]Jerry Bonnell ([40]UMCP) NASA Official: Phillip Newman [41]Specific rights apply. [42]NASA Web Privacy Policy and Important Notices A service of: [43]ASD at [44]NASA / [45]GSFC & [46]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2107/MartianFace_Viking_960.jpg 3. https://www.nasa.gov/ 4. https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=1975-075A 5. https://www.boredpanda.com/amazing-cloud-formations/ 6. https://youtu.be/bcrEqIpi6sg 7. https://www.reddit.com/r/funny/comments/4h39hu/we_all_have_the_laundry_chair_right/ 8. https://en.wikipedia.org/wiki/Superhero 9. https://photojournal.jpl.nasa.gov/catalog/PIA01141 10. https://mars.nasa.gov/resources/6279/geologic-face-on-mars-formation/ 11. https://solarsystem.nasa.gov/planets/mars/overview/ 12. https://climatekids.nasa.gov/cloud-formation/ 13. https://science.nasa.gov/science-news/science-at-nasa/2001/ast24may_1 14. https://apod.nasa.gov/apod/ap010528.html 15. https://apod.nasa.gov/apod/ap060926.html 16. https://catingtonpost.com/wp-content/uploads/2018/03/145904480.jpg 17. https://physicsworld.com/a/its-raining-again/ 18. https://apod.nasa.gov/debate/debate100th.html 19. http://www.thegoodscentscompany.com/odor/root-beer.html 20. https://www.goodreads.com/quotes/644987-we-shall-not-cease-from-exploration-and-the-end-of 21. https://science.howstuffworks.com/innovation/inventions/top-5-nasa-inventions.htm 22. https://science.nasa.gov/astrophysics/big-questions 23. https://solarsystem.nasa.gov/ 24. https://apod.nasa.gov/apod/ap200121.html 25. https://apod.nasa.gov/apod/ap180429.html 26. https://apod.nasa.gov/apod/ap210703.html 27. https://apod.nasa.gov/apod/archivepix.html 28. https://apod.nasa.gov/apod/lib/apsubmit2015.html 29. https://apod.nasa.gov/apod/lib/aptree.html 30. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 31. https://apod.nasa.gov/apod/calendar/allyears.html 32. https://apod.nasa.gov/apod.rss 33. https://apod.nasa.gov/apod/lib/edlinks.html 34. https://apod.nasa.gov/apod/lib/about_apod.html 35. http://asterisk.apod.com/discuss_apod.php?date=210704 36. https://apod.nasa.gov/apod/ap210705.html 37. http://www.phy.mtu.edu/faculty/Nemiroff.html 38. http://www.phy.mtu.edu/ 39. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 40. http://www.astro.umd.edu/ 41. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 42. https://www.nasa.gov/about/highlights/HP_Privacy.html 43. https://astrophysics.gsfc.nasa.gov/ 44. https://www.nasa.gov/ 45. https://www.nasa.gov/centers/goddard/ 46. http://www.mtu.edu/