¿ 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. 2020 December 27 [2]See Explanation. Clicking on the picture will download the highest resolution version available. Cosmic Latte: The Average Color of the Universe Color Credit: [3]Karl Glazebrook & [4]Ivan Baldry ([5]JHU) Explanation: What color is the universe? More precisely, if the [6]entire sky were smeared out, what color would the final mix be? This [7]whimsical question came up when trying to determine what stars are commonplace in nearby galaxies. The answer, [8]depicted above, is a [9]conditionally perceived shade of [10]beige. In computer parlance: #[11]FFF8E7. To determine this, astronomers computationally averaged the light emitted by one of the larger samples of [12]galaxies analyzed: the 200,000 [13]galaxies of the [14]2dF survey. The resulting [15]cosmic spectrum has some emission in all parts of the [16]electromagnetic spectrum, but a single perceived composite color. [17]This color has become much less blue over [18]the past 10 billion years, indicating that redder stars are becoming more prevalent. In a [19]contest to better name the color, notable entries included skyvory, univeige, and the winner: [20]cosmic latte. Gallery: [21]Notable images of the Great Conjunction submitted to APOD Tomorrow's picture: eagle 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]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2012/cosmiclatte_jhu_960.jpg 3. https://en.wikipedia.org/wiki/Karl_Glazebrook 4. https://www.astro.ljmu.ac.uk/~ikb/ 5. https://physics-astronomy.jhu.edu/ 6. https://apod.nasa.gov/apod/ap020310.html 7. http://sten.astronomycafe.net/faqs/ 8. http://www.pha.jhu.edu/~kgb/cosspec/ 9. https://www.aao.org/eye-health/tips-prevention/how-humans-see-in-color 10. http://en.wikipedia.org/wiki/Beige 11. https://www.color-hex.com/color/fff8e7 12. https://apod.nasa.gov/apod/ap071007.html 13. https://apod.nasa.gov/apod/ap010904.html 14. http://magnum.anu.edu.au/~TDFgg/ 15. https://ui.adsabs.harvard.edu/abs/2002ApJ...569..582B/abstract 16. https://science.nasa.gov/ems/01_intro 17. https://www.curiositybox.com/blogs/inqs-corner/cosmic-latte-the-average-color-of-the-universe 18. https://apod.nasa.gov/apod/ap180508.html 19. https://en.wikipedia.org/wiki/Cosmic_latte#Naming_of_the_color 20. https://en.wikipedia.org/wiki/Cosmic_latte 21. https://www.facebook.com/media/set/?vanity=APOD.Sky&set=a.3211133262324204 22. https://apod.nasa.gov/apod/ap201226.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. http://asterisk.apod.com/discuss_apod.php?date=201227 32. https://apod.nasa.gov/apod/ap201228.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. http://www.mtu.edu/