﻿ 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 May 31 IFRAME: [2]https://www.youtube.com/embed/X4UF9Akman0?rel=0 Simulation: A Disk Galaxy Forms Video Credit: [3]TNG Collaboration, [4]MPCDF, [5]FAS Harvard U.; Music: World's Sunrise ([6]YouTube: Jimena Contreras) Explanation: How did we get here? We know that we live on a [7]planet orbiting a [8]star orbiting a [9]galaxy, but how did all of this form? Since our universe [10]moves too slowly to watch, faster-moving computer simulations are [11]created to help find out. Specifically, [12]this featured video from the [13]Illustris[14]TNG collaboration tracks gas from the early universe ([15]redshift 12) until today ([16]redshift 0). As the [17]simulation begins, ambient gas falls into and accumulates in a region of relatively high [18]gravity. After a few billion years, a well-defined center materializes from a strange and fascinating [19]cosmic dance. Gas blobs -- some representing [20]small satellite galaxies -- continue to fall into and become absorbed by the rotating galaxy as the present epoch is reached and the video ends. For the [21]Milky Way Galaxy, however, big mergers may not be over -- recent evidence indicates that our large spiral disk Galaxy [22]will collide and coalesce with the slightly larger [23]Andromeda spiral disk galaxy in the next few billion years. Open Science: [24]Browse 3,000+ codes in the Astrophysics Source Code Library Tomorrow's picture: recycling a star __________________________________________________________________ [25]< | [26]Archive | [27]Submissions | [28]Index | [29]Search | [30]Calendar | [31]RSS | [32]Education | [33]About APOD | [34]Discuss | [35]> __________________________________________________________________ Authors & editors: [36]Robert Nemiroff ([37]MTU) & [38]Jerry Bonnell ([39]UMCP) NASA Official: Phillip Newman [40]Specific rights apply. [41]NASA Web Privacy Policy and Important 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://www.youtube.com/embed/X4UF9Akman0?rel=0 3. https://www.tng-project.org/about/ 4. https://www.mpcdf.mpg.de/ 5. https://www.rc.fas.harvard.edu/ 6. https://www.youtube.com/watch?v=7BBnB-j6U-c 7. https://apod.nasa.gov/apod/ap220206.html 8. https://solarsystem.nasa.gov/solar-system/sun/overview/ 9. https://apod.nasa.gov/apod/ap080606.html 10. https://cdn.shopify.com/s/files/1/0272/4770/6214/articles/do-cats-get-bored-800x533.jpg 11. https://m.media-amazon.com/images/I/51ZjBEW+qNL.jpg 12. https://www.tng-project.org/media/ 13. http://www.illustris-project.org/ 14. http://www.tng-project.org/ 15. https://apod.nasa.gov/apod/ap130408.html 16. https://en.wikipedia.org/wiki/Redshift 17. https://www.tng-project.org/media/ 18. https://spaceplace.nasa.gov/what-is-gravity/en/ 19. https://apod.nasa.gov/cgi-bin/apod/apod_search?tquery=colliding+galaxy 20. http://www.atlasoftheuniverse.com/sattelit.html 21. http://cass.ucsd.edu/archive/public/tutorial/MW.html 22. https://apod.nasa.gov/apod/ap120604.html 23. https://apod.nasa.gov/apod/ap181217.html 24. https://ascl.net/code/all 25. https://apod.nasa.gov/apod/ap230530.html 26. https://apod.nasa.gov/apod/archivepix.html 27. https://apod.nasa.gov/apod/lib/apsubmit2015.html 28. https://apod.nasa.gov/apod/lib/aptree.html 29. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search 30. https://apod.nasa.gov/apod/calendar/allyears.html 31. https://apod.nasa.gov/apod.rss 32. https://apod.nasa.gov/apod/lib/edlinks.html 33. https://apod.nasa.gov/apod/lib/about_apod.html 34. https://asterisk.apod.com/discuss_apod.php?date=230531 35. https://apod.nasa.gov/apod/ap230601.html 36. http://www.phy.mtu.edu/faculty/Nemiroff.html 37. http://www.phy.mtu.edu/ 38. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html 39. http://www.astro.umd.edu/ 40. https://apod.nasa.gov/apod/lib/about_apod.html#srapply 41. https://www.nasa.gov/about/highlights/HP_Privacy.html 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/