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 September 14
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                             NGC 7331 and Beyond
               Image Credit & [3]Copyright: [4]Ian Gorenstein

   Explanation: Big, beautiful spiral galaxy [5]NGC 7331 is often touted
   as an analog to our own [6]Milky Way. About 50 million light-years
   distant in the northern constellation [7]Pegasus, NGC 7331 was
   recognized early on as a spiral nebula and is actually one of the
   brighter [8]galaxies not included in Charles Messier's [9]famous 18th
   century catalog. Since the galaxy's disk [10]is inclined to our
   line-of-sight, long telescopic exposures often result in images that
   evokes a strong sense of depth. The effect is further enhanced [11]in
   this sharp image by galaxies that lie beyond the gorgeous [12]island
   universe. The most prominent background galaxies are about one tenth
   the [13]apparent size of NGC 7331 and so lie roughly ten times farther
   away. Their close alignment on the sky with NGC 7331 occurs just by
   chance. Lingering above the plane of the Milky Way, this striking
   visual grouping of galaxies is known to some as the [14]Deer Lick
   Group.

                    Tomorrow's picture: good morning moon
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    Authors & editors: [26]Robert Nemiroff ([27]MTU) & [28]Jerry Bonnell
                                 ([29]UMCP)
          NASA Official: Phillip Newman [30]Specific rights apply.
              [31]NASA Web Privacy Policy and Important Notices
                A service of: [32]ASD at [33]NASA / [34]GSFC,
                         [35]NASA Science Activation
                           & [36]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2309/LRGBHa23_n7331r.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.astrobin.com/users/laperuz/
   5. http://messier.seds.org/xtra/ngc/n7331.html
   6. https://apod.nasa.gov/apod/ap080606.html
   7. http://hawastsoc.org/deepsky/peg/index.html
   8. http://www.seasky.org/cosmic/sky7a07.html
   9. https://www.nasa.gov/content/explore-the-night-sky-hubble-s-messier-catalog-bio
  10. https://apod.nasa.gov/apod/ap040701.html
  11. https://www.astrobin.com/6xa02f/
  12. http://nedwww.ipac.caltech.edu/level5/March02/Gordon/Gordon2.html
  13. http://chandra.harvard.edu/photo/scale.html
  14. https://en.wikipedia.org/wiki/NGC_7331_Group
  15. https://apod.nasa.gov/apod/ap230913.html
  16. https://apod.nasa.gov/apod/archivepix.html
  17. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  18. https://apod.nasa.gov/apod/lib/aptree.html
  19. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  20. https://apod.nasa.gov/apod/calendar/allyears.html
  21. https://apod.nasa.gov/apod.rss
  22. https://apod.nasa.gov/apod/lib/edlinks.html
  23. https://apod.nasa.gov/apod/lib/about_apod.html
  24. http://asterisk.apod.com/discuss_apod.php?date=230914
  25. https://apod.nasa.gov/apod/ap230915.html
  26. http://www.phy.mtu.edu/faculty/Nemiroff.html
  27. http://www.phy.mtu.edu/
  28. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  29. http://www.astro.umd.edu/
  30. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  31. https://www.nasa.gov/about/highlights/HP_Privacy.html
  32. https://astrophysics.gsfc.nasa.gov/
  33. https://www.nasa.gov/
  34. https://www.nasa.gov/centers/goddard/
  35. https://science.nasa.gov/learners
  36. http://www.mtu.edu/