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 June 5
     [2]The featured image shows two bright sources near the center of a
    nearby galaxy. The object is called 3C 75. The two bright sources are
   thought to be two black holes slowly spiraling together. exhaust makes
   the Sun's outline appear to ripple. Please see the explanation for more
                            detailed information.

                      Two Black Holes Dancing in 3C 75
    Image Credit: X-Ray: [3]NASA/[4]CXC/[5]D. Hudson, T. Reiprich et al.
                    ([6]AIfA); Radio: [7]NRAO/VLA/ [8]NRL

   Explanation: What's happening at the center of active galaxy 3C 75? The
   two bright sources at the center of [9]this composite x-ray (blue)/
   [10]radio (pink) image are co-orbiting supermassive black holes
   powering the giant radio source [11]3C 75. Surrounded by multimillion
   degree [12]x-ray emitting gas, and blasting out jets of relativistic
   particles the [13]supermassive black holes are separated by 25,000
   [14]light-years. At the cores of [15]two merging galaxies in the
   [16]Abell 400 galaxy cluster they are some 300 million light-years
   away. [17]Astronomers conclude that these two supermassive [18]black
   holes are bound together by gravity in a binary system [19]in part
   because the jets' consistent swept back appearance is most likely due
   to their common motion as they speed through the [20]hot cluster gas at
   about 1200 kilometers per second. Such [21]spectacular cosmic mergers
   are thought to be common in crowded [22]galaxy cluster environments in
   the [23]distant universe. In their [24]final stages, the mergers are
   expected to be [25]intense sources of [26]gravitational waves.

                    Tomorrow's picture: Milky Way doomed
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    Authors & editors: [38]Robert Nemiroff ([39]MTU) & [40]Jerry Bonnell
                                 ([41]UMCP)
          NASA Official: Phillip Newman [42]Specific rights apply.
              [43]NASA Web Privacy Policy and Important Notices
                A service of: [44]ASD at [45]NASA / [46]GSFC
                           & [47]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2206/3c75_chandraNRAO_960.jpg
   3. https://www.nasa.gov/
   4. https://chandra.harvard.edu/
   5. https://arxiv.org/abs/astro-ph/0603272
   6. http://www.astro.uni-bonn.de/
   7. https://www.vla.nrao.edu/
   8. https://www.nrl.navy.mil/
   9. https://chandra.harvard.edu/photo/2006/a400/
  10. https://chandra.harvard.edu/photo/2006/a400/more.html
  11. https://en.wikipedia.org/wiki/3C_75
  12. https://science.nasa.gov/ems/11_xrays
  13. https://astronomy.swin.edu.au/cosmos/S/Supermassive+Black+Hole
  14. https://spaceplace.nasa.gov/light-year/en/
  15. https://chandra.harvard.edu/photo/2006/a400/animations.html
  16. https://en.wikipedia.org/wiki/Abell_400
  17. https://chandra.harvard.edu/press/06_releases/press_040606.html
  18. https://apod.nasa.gov/htmltest/rjn_bht.html
  19. https://ui.adsabs.harvard.edu/abs/2006A&A...453..433H/abstract
  20. https://apod.nasa.gov/apod/ap170504.html
  21. https://apod.nasa.gov/apod/ap071101.html
  22. https://chandra.harvard.edu/xray_sources/galaxy_clusters.html
  23. https://apod.nasa.gov/apod/ap220316.html
  24. https://apod.nasa.gov/apod/ap190414.html
  25. https://images.wagwalkingweb.com/media/training_guides/cover-his-eyes/hero/cover-his-eyes.jpg
  26. https://apod.nasa.gov/apod/ap201104.html
  27. https://apod.nasa.gov/apod/ap220604.html
  28. https://apod.nasa.gov/apod/archivepix.html
  29. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  30. https://apod.nasa.gov/apod/lib/aptree.html
  31. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  32. https://apod.nasa.gov/apod/calendar/allyears.html
  33. https://apod.nasa.gov/apod.rss
  34. https://apod.nasa.gov/apod/lib/edlinks.html
  35. https://apod.nasa.gov/apod/lib/about_apod.html
  36. http://asterisk.apod.com/discuss_apod.php?date=220605
  37. https://apod.nasa.gov/apod/ap220606.html
  38. http://www.phy.mtu.edu/faculty/Nemiroff.html
  39. http://www.phy.mtu.edu/
  40. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  41. http://www.astro.umd.edu/
  42. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  43. https://www.nasa.gov/about/highlights/HP_Privacy.html
  44. https://astrophysics.gsfc.nasa.gov/
  45. https://www.nasa.gov/
  46. https://www.nasa.gov/centers/goddard/
  47. http://www.mtu.edu/