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. 2023 July 10 [2]A busy star formation region is shown highlighted by red glowing clouds and dark ominously-shaped dust. Please see the explanation for more detailed information. Stars, Dust and Nebula in NGC 6559 Image Credit & Copyright: [3]Adam Block, [4]Telescope Live Explanation: When stars form, pandemonium reigns. A [5]textbook case is the star forming region [6]NGC 6559. Visible in the [7]featured image are red glowing [8]emission nebulas of [9]hydrogen, blue [10]reflection nebulas of [11]dust, dark [12]absorption nebulas of dust, and the stars that formed from them. The [13]first massive stars formed from the dense gas will emit [14]energetic light and [15]winds that erode, fragment, and [16]sculpt their birthplace. And then they [17]explode. The resulting [18]morass can be as beautiful as it is [19]complex. After tens of millions of years, the dust [20]boils away, the gas gets swept away, and all that is left is a bare [21]open cluster of stars. Tomorrow's picture: sun spotted __________________________________________________________________ [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]NASA Science Activation & [43]Michigan Tech. U. References 1. https://apod.nasa.gov/apod/archivepix.html 2. https://apod.nasa.gov/apod/image/2307/NGC6559_Block_1311.jpg 3. https://www.adamblockphotos.com/about.html 4. https://telescope.live/ 5. https://openstax.org/books/astronomy-2e/pages/21-1-star-formation 6. https://en.wikipedia.org/wiki/NGC_6559 7. https://www.adamblockphotos.com/ngc-6559.html 8. https://en.wikipedia.org/wiki/Emission_nebula 9. https://www.nasa.gov/topics/technology/hydrogen/index.html 10. https://en.wikipedia.org/wiki/Reflection_nebula 11. https://apod.nasa.gov/apod/ap030706.html 12. https://astronomy.swin.edu.au/cosmos/D/Dark+Nebula 13. https://apod.nasa.gov/apod/ap030610.html 14. https://science.nasa.gov/ems/10_ultravioletwaves 15. https://esahubble.org/wordbank/stellar-wind/ 16. https://apod.nasa.gov/apod/ap070606.html 17. http://heasarc.gsfc.nasa.gov/docs/snr.html 18. https://sounddogconnection.com/wp-content/uploads/2018/07/Toilet-Paper-660x371.jpg 19. https://apod.nasa.gov/apod/ap200706.html 20. https://youtu.be/1uUFI0w5Tj0 21. https://en.wikipedia.org/wiki/Open_cluster 22. https://apod.nasa.gov/apod/ap230709.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. https://asterisk.apod.com/discuss_apod.php?date=230710 32. https://apod.nasa.gov/apod/ap230711.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. https://science.nasa.gov/learners 43. http://www.mtu.edu/