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.

                                2019 August 6
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                    The Local Void in the Nearby Universe
          Image Credit: [3]R. Brent Tully ([4]U. Hawaii) [5]et al.

   Explanation: What does our region of the Universe look like? Since
   galaxies are so spread out over the sky, and since our [6]Milky Way
   Galaxy blocks part of the distant sky, it has been hard to tell. A
   [7]new map has been made, however, using large-scale galaxy motions to
   infer what massive objects must be gravitating in the [8]nearby
   universe. The [9]featured map, spanning over 600 million light years on
   a side, shows that our Milky Way Galaxy is on the edge of the [10]Virgo
   Cluster of Galaxies, which is connected to the [11]Great Attractor --
   an even larger grouping of galaxies. Also nearby are the massive
   [12]Coma Cluster and the extensive [13]Perseus-Pisces Supercluster.
   Conversely, we are also on the edge of huge region nearly empty of
   galaxies known as the Local Void. The repulsive push by the [14]Local
   Void combined with the gravitational pull toward the elevated galaxy
   density on the other side of the sky explains part of the
   [15]mysteriously high speed our Galaxy has relative to the [16]cosmic
   microwave background -- but not all. To explore the local [17]universe
   yourself, as determined by [18]Cosmicflows-3, you are invited to zoom
   in and spin around [19]this interactive 3D visualization.

                     Tomorrow's picture: jupiter's jaws
     __________________________________________________________________

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    Authors & editors: [31]Robert Nemiroff ([32]MTU) & [33]Jerry Bonnell
                                 ([34]UMCP)
          NASA Official: Phillip Newman [35]Specific rights apply.
              [36]NASA Web Privacy Policy and Important Notices
                A service of: [37]ASD at [38]NASA / [39]GSFC
                           & [40]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/1908/VoidMap_Tully_1288.jpg
   3. https://www.ifa.hawaii.edu/~tully/
   4. https://www.ifa.hawaii.edu/
   5. https://ui.adsabs.harvard.edu/abs/2019ApJ...880...24T/abstract
   6. https://solarsystem.nasa.gov/resources/285/the-milky-way-galaxy/
   7. https://ui.adsabs.harvard.edu/abs/2019ApJ...880...24T/abstract
   8. https://apod.nasa.gov/apod/ap110614.html
   9. http://www.ifa.hawaii.edu/info/press-releases/local_void/
  10. https://apod.nasa.gov/apod/ap150804.html
  11. https://en.wikipedia.org/wiki/Great_Attractor
  12. https://apod.nasa.gov/apod/ap180326.html
  13. https://en.wikipedia.org/wiki/Perseus-Pisces_Supercluster
  14. https://en.wikipedia.org/wiki/Local_Void
  15. https://apod.nasa.gov/apod/ap140615.html
  16. https://en.wikipedia.org/wiki/Cosmic_microwave_background
  17. https://apod.nasa.gov/apod/ap180508.html
  18. https://arxiv.org/abs/1605.01765
  19. https://skfb.ly/6KP9Z
  20. https://apod.nasa.gov/apod/ap190805.html
  21. https://apod.nasa.gov/apod/archivepix.html
  22. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  23. https://apod.nasa.gov/apod/lib/aptree.html
  24. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  25. https://apod.nasa.gov/apod/calendar/allyears.html
  26. https://apod.nasa.gov/apod.rss
  27. https://apod.nasa.gov/apod/lib/edlinks.html
  28. https://apod.nasa.gov/apod/lib/about_apod.html
  29. http://asterisk.apod.com/discuss_apod.php?date=190806
  30. https://apod.nasa.gov/apod/ap190807.html
  31. http://www.phy.mtu.edu/faculty/Nemiroff.html
  32. http://www.phy.mtu.edu/
  33. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  34. http://www.astro.umd.edu/
  35. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  36. https://www.nasa.gov/about/highlights/HP_Privacy.html
  37. https://astrophysics.gsfc.nasa.gov/
  38. https://www.nasa.gov/
  39. https://www.nasa.gov/centers/goddard/
  40. http://www.mtu.edu/