﻿ 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. 2024 June 11 [2]Colorful nebula and stars fill the wide images. The yellow star Antares is visible on the left and blue reflection nebula surround a central nebula and the nebula on the right surrounding the Rho Ophiuchi star system. Please see the explanation for more detailed information. Colorful Stars and Clouds near Rho Ophiuchi Image Credit & Copyright: [3]Craig Stocks Explanation: Why is the sky near [4]Antares and [5]Rho Ophiuchi so colorful, yet dusty? The colors result from a mixture of objects and processes. Fine dust -- illuminated by starlight -- produces blue [6]reflection nebulae. Gaseous clouds whose atoms are [7]excited by [8]ultraviolet starlight produce reddish [9]emission nebulae. Backlit [10]dust clouds block starlight and so [11]appear dark. [12]Antares, a [13]red supergiant and one of the [14]brighter stars in the night sky, lights up the yellow-red clouds on the upper right of the featured image. The [15]Rho Ophiuchi star system lies at the center of the blue [16]reflection nebula on the left, while a different reflection nebula, [17]IC 4605, [18]lies just below and right of the image center. These star clouds are even more [19]colorful than [20]humans can see, emitting light across the [21]electromagnetic spectrum. Open Science: [22]Browse 3,400+ codes in the Astrophysics Source Code Library Tomorrow's picture: unexpected sky __________________________________________________________________ [23]< | [24]Archive | [25]Submissions | [26]Index | [27]Search | [28]Calendar | [29]RSS | [30]Education | [31]About APOD | [32]Discuss | [33]> __________________________________________________________________ Authors & editors: [34]Robert Nemiroff ([35]MTU) & [36]Jerry Bonnell ([37]UMCP) NASA Official: Amber Straughn [38]Specific rights apply. [39]NASA Web Privacy, [40]Accessibility, [41]Notices; A service of: [42]ASD at [43]NASA / [44]GSFC, [45]NASA Science Activation & [46]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2406/RhoAntares_Stocks_2560.jpg 3. https://www.craigstocksarts.com/resume.html 4. https://en.wikipedia.org/wiki/Antares 5. https://en.wikipedia.org/wiki/Rho_Ophiuchi_cloud_complex 6. https://apod.nasa.gov/apod/reflection_nebulae.html 7. https://i.pinimg.com/736x/5f/02/9e/5f029e83ee5a6c667a6a70cb18202307.jpg 8. https://science.nasa.gov/ems/10_ultravioletwaves 9. https://apod.nasa.gov/apod/ap210214.html 10. https://apod.nasa.gov/apod/ap030706.html 11. https://apod.nasa.gov/apod/ap230129.html 12. http://stars.astro.illinois.edu/sow/antares.html 13. http://hyperphysics.phy-astr.gsu.edu/hbase/astro/redsup.html 14. https://en.wikipedia.org/wiki/List_of_brightest_stars#Table 15. https://en.wikipedia.org/wiki/Rho_Ophiuchi 16. https://en.wikipedia.org/wiki/Reflection_nebula 17. https://www.astrobin.com/migind/C/ 18. https://apod.nasa.gov/apod/ap090615.html 19. https://spaceplace.nasa.gov/color-your-universe-game/en/ 20. https://apod.nasa.gov/apod/ap190818.html 21. https://science.nasa.gov/ems/01_intro 22. https://ascl.net/code/all 23. https://apod.nasa.gov/apod/ap240610.html 24. https://apod.nasa.gov/apod/archivepix.html 25. https://apod.nasa.gov/apod/lib/apsubmit2015.html 26. https://apod.nasa.gov/apod/lib/aptree.html 27. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 28. https://apod.nasa.gov/apod/calendar/allyears.html 29. https://apod.com/feed.rss 30. https://apod.nasa.gov/apod/lib/edlinks.html 31. https://apod.nasa.gov/apod/lib/about_apod.html 32. https://asterisk.apod.com/discuss_apod.php?date=240611 33. https://apod.nasa.gov/apod/ap240612.html 34. http://www.phy.mtu.edu/faculty/Nemiroff.html 35. http://www.phy.mtu.edu/ 36. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 37. http://www.astro.umd.edu/ 38. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 39. https://www.nasa.gov/about/highlights/HP_Privacy.html 40. https://www.nasa.gov/general/accessibility/ 41. https://www.nasa.gov/privacy/ 42. https://astrophysics.gsfc.nasa.gov/ 43. https://www.nasa.gov/ 44. https://www.nasa.gov/centers/goddard/ 45. https://science.nasa.gov/learners 46. http://www.mtu.edu/