﻿ 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 March 23 [2]The featured image depicts the Bubble Nebula as captured by the Hubble Space Telescope. Please see the explanation for more detailed information. The Bubble Nebula from Hubble Image Credit: [3]NASA, [4]ESA, [5]Hubble; Processing & Copyright: [6]Mehmet Hakan Özsaraç Explanation: Massive stars can blow bubbles. The featured image shows perhaps the most famous of all star-bubbles, NGC 7635, also known simply as [7]The Bubble Nebula. Although it looks delicate, the 7-light-year diameter [8]bubble offers evidence of violent processes at work. Above and left of [9]the Bubble's center is a hot, [10]O-type star, several hundred thousand times more luminous and some 45-times more massive than the Sun. A fierce [11]stellar wind and intense radiation from that star has blasted out the [12]structure of glowing gas against denser material [13]in a surrounding [14]molecular cloud. The [15]intriguing Bubble Nebula and associated cloud complex lie a mere 7,100 [16]light-years away toward the boastful constellation [17]Cassiopeia. [18]This sharp, tantalizing view of the [19]cosmic bubble is a reprocessed composite of previously acquired [20]Hubble Space Telescope image data. Birthday Surprise: [21]What picture did APOD feature on your birthday? (post 1995) Tomorrow's picture: open 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/2203/Bubble_HubbleOzsarac_1952.jpg 3. https://www.nasa.gov/ 4. https://www.esa.int/ 5. https://www.nasa.gov/mission_pages/hubble/main/index.html 6. https://www.mhozsarac.com/ozgecmis 7. https://hubblesite.org/contents/media/images/2016/13/3725-Image.html 8. https://www.exploratorium.edu/ronh/bubbles/bubbles.html 9. https://ui.adsabs.harvard.edu/abs/2002AJ....124.3313M/abstract 10. https://en.wikipedia.org/wiki/O-type_star 11. https://astronomy.swin.edu.au/cosmos/s/stellar+winds 12. https://ui.adsabs.harvard.edu/abs/1995A&A...295..509C/abstract 13. https://apod.nasa.gov/apod/ap210925.html 14. https://en.wikipedia.org/wiki/Molecular_cloud 15. https://i.imgur.com/xxPkvxt.jpeg 16. https://spaceplace.nasa.gov/light-year/en/ 17. http://www.hawastsoc.org/deepsky/cas/index.html 18. https://www.flickr.com/photos/mhozsarac/51838909434/in/dateposted-public/ 19. https://apod.nasa.gov/apod/ap170531.html 20. http://heritage.stsci.edu/2016/13/fast_facts.html 21. https://apod.nasa.gov/apod/calendar/allyears.html 22. https://apod.nasa.gov/apod/ap220322.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=220323 32. https://apod.nasa.gov/apod/ap220324.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/