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.

                              2020 September 18
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                      Arp 78: Peculiar Galaxy in Aries
               Image Credit & [3]Copyright: [4]Bernard Miller

   Explanation: (xxxedit and linkxxx) [5]Peculiar spiral galaxy Arp 78 is
   found within the boundaries of the head strong [6]constellation Aries,
   some 100 million light-years [7]beyond the stars and nebulae of our
   Milky Way galaxy. [8]Also known as NGC 772, the island universe is over
   100,000 light-years across and sports a single prominent outer spiral
   arm in [9]this detailed cosmic portrait. Its brightest companion
   galaxy, compact NGC 770, is toward the upper right of the larger
   spiral. NGC 770's fuzzy, elliptical appearance contrasts nicely with a
   spiky foreground Milky Way star in matching yellowish hues. Tracking
   along sweeping dust lanes and [10]lined with young blue star clusters,
   Arp 78's large spiral arm is likely due to gravitational tidal
   interactions. Faint streams of material seem to connect Arp 78 with its
   nearby companion galaxies.

                        Tomorrow's picture: 3D Orion
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    Authors & editors: [22]Robert Nemiroff ([23]MTU) & [24]Jerry Bonnell
                                 ([25]UMCP)
          NASA Official: Phillip Newman [26]Specific rights apply.
              [27]NASA Web Privacy Policy and Important Notices
                A service of: [28]ASD at [29]NASA / [30]GSFC
                           & [31]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2009/NGC772_PS2_CROP_INSIGHT2048.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. http://azstarman.net/CDK/index.html
   5. http://ned.ipac.caltech.edu/level5/Arp/frames.html
   6. http://hawastsoc.org/deepsky/ari/index.html
   7. https://apod.nasa.gov/apod/ap070712.html
   8. https://www.nasa.gov/image-feature/goddard/2019/hubble-spots-a-curious-spiral
   9. http://azstarman.net/CDK/NGC772.htm
  10. http://arxiv.org/abs/0810.1748
  11. https://apod.nasa.gov/apod/ap200917.html
  12. https://apod.nasa.gov/apod/archivepix.html
  13. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  14. https://apod.nasa.gov/apod/lib/aptree.html
  15. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  16. https://apod.nasa.gov/apod/calendar/allyears.html
  17. https://apod.nasa.gov/apod.rss
  18. https://apod.nasa.gov/apod/lib/edlinks.html
  19. https://apod.nasa.gov/apod/lib/about_apod.html
  20. http://asterisk.apod.com/discuss_apod.php?date=200918
  21. https://apod.nasa.gov/apod/ap200919.html
  22. http://www.phy.mtu.edu/faculty/Nemiroff.html
  23. http://www.phy.mtu.edu/
  24. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  25. http://www.astro.umd.edu/
  26. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  27. https://www.nasa.gov/about/highlights/HP_Privacy.html
  28. https://astrophysics.gsfc.nasa.gov/
  29. https://www.nasa.gov/
  30. https://www.nasa.gov/centers/goddard/
  31. http://www.mtu.edu/