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 May 8

         IFRAME: [2]https://www.youtube.com/embed/l36UkYtq6m0?rel=0

                 Visualization: A Black Hole Accretion Disk
      Visualization Credit: [3]NASA’s [4]Goddard Space Flight Center,
                            [5]Jeremy Schnittman

   Explanation: What would it look like to circle a black hole? If the
   [6]black hole was surrounded by a [7]swirling disk of glowing and
   accreting gas, then the great gravity of the black hole would
   [8]deflect light emitted by the disk to make it look very unusual. The
   [9]featured animated video gives a visualization. The video starts with
   you, [10]the observer, looking toward the [11]black hole from just
   above the plane of the accretion disk. Surrounding the central
   [12]black hole is a thin circular image of the orbiting disk that marks
   the position of the [13]photon sphere -- inside of which lies the black
   hole's [14]event horizon. Toward the left, parts of the large main
   image of the disk [15]appear brighter as they move toward you. As
   [16]the video continues, you loop over the [17]black hole, soon looking
   down from the top, then passing through the disk plane on the far side,
   then returning to your [18]original vantage point. The accretion disk
   does some interesting [19]image inversions -- but never appears flat.
   Visualizations such as this are particularly relevant today as
   [20]black holes are [21]being imaged in [22]unprecedented detail by the
   [23]Event Horizon Telescope.

          Singularity Impressive: [24]It's Black Hole Week at NASA!
                    Tomorrow's picture: famous black hole
     __________________________________________________________________

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     __________________________________________________________________

    Authors & editors: [36]Robert Nemiroff ([37]MTU) & [38]Jerry Bonnell
                                 ([39]UMCP)
          NASA Official: Amber Straughn [40]Specific rights apply.
            [41]NASA Web Privacy, [42]Accessibility, [43]Notices;
                A service of: [44]ASD at [45]NASA / [46]GSFC,
                         [47]NASA Science Activation
                           & [48]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://www.youtube.com/embed/l36UkYtq6m0?rel=0
   3. https://www.nasa.gov/
   4. https://science.gsfc.nasa.gov/sci/
   5. https://science.gsfc.nasa.gov/sed/bio/jeremy.d.schnittman
   6. https://science.nasa.gov/universe/black-holes/
   7. https://apod.nasa.gov/apod/ap190820.html
   8. https://www.phy.mtu.edu/bht/rjn_bht.html
   9. https://svs.gsfc.nasa.gov/13326
  10. https://images.freeimages.com/images/large-previews/755/dog-looking-at-the-camera-1411251.jpg
  11. https://apod.nasa.gov/apod/ap240505.html
  12. https://jila.colorado.edu/news-events/articles/what-happens-when-you-fall-black-hole
  13. https://en.wikipedia.org/wiki/Photon_sphere
  14. https://en.wikipedia.org/wiki/Event_horizon
  15. https://en.wikipedia.org/wiki/Aberration_(astronomy)
  16. https://www.youtube.com/watch?v=l36UkYtq6m0
  17. https://ui.adsabs.harvard.edu/abs/1993AmJPh..61..619N/abstract
  18. https://apod.nasa.gov/apod/image/2008/BhAccretionDisk_NasaSchnittman_3851_annotated.jpg
  19. https://apod.nasa.gov/apod/ap141026.html
  20. https://apod.nasa.gov/apod/ap190411.html
  21. https://apod.nasa.gov/apod/ap240401.html
  22. https://apod.nasa.gov/apod/ap220513.html
  23. https://eventhorizontelescope.org/
  24. https://science.nasa.gov/universe/black-hole-week/
  25. https://apod.nasa.gov/apod/ap240507.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.com/feed.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=240508
  35. https://apod.nasa.gov/apod/ap240509.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://www.nasa.gov/general/accessibility/
  43. https://www.nasa.gov/privacy/
  44. https://astrophysics.gsfc.nasa.gov/
  45. https://www.nasa.gov/
  46. https://www.nasa.gov/centers/goddard/
  47. https://science.nasa.gov/learners
  48. http://www.mtu.edu/