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 September 22
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                              NGC 7331 Close Up
    Image Credit & [3]License: ESA/Hubble & NASA/D. Milisavljevic (Purdue
                                 University)

   Explanation: Big, beautiful spiral galaxy [4]NGC 7331 is often touted
   as an analog to our own [5]Milky Way. About 50 million light-years
   distant in the northern constellation [6]Pegasus, NGC 7331 was
   recognized early on as [7]a spiral nebula and is actually one of the
   brighter galaxies not included in Charles Messier's [8]famous 18th
   century catalog. Since the galaxy's disk [9]is inclined to our
   line-of-sight, long telescopic exposures often result in an image that
   evokes a strong sense of depth. This [10]Hubble Space Telescope
   close-up spans some 40,000 light-years. The galaxy's magnificent spiral
   arms feature dark obscuring dust lanes, bright bluish clusters of
   massive young stars, and the telltale reddish glow of active star
   forming regions. The bright yellowish central regions harbor
   populations of older, cooler stars. [11]Like the Milky Way, a
   supermassive black hole lies at the core of spiral galaxy NGC 7331.

                  Tomorrow's picture: ringed planet Neptune
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    Authors & editors: [23]Robert Nemiroff ([24]MTU) & [25]Jerry Bonnell
                                 ([26]UMCP)
          NASA Official: Phillip Newman [27]Specific rights apply.
              [28]NASA Web Privacy Policy and Important Notices
                A service of: [29]ASD at [30]NASA / [31]GSFC,
                         [32]NASA Science Activation
                           & [33]Michigan Tech. U.

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2209/potw1805a_ngc7331.jpg
   3. https://creativecommons.org/licenses/by/4.0/
   4. http://messier.seds.org/xtra/ngc/n7331.html
   5. https://apod.nasa.gov/apod/ap080606.html
   6. http://hawastsoc.org/deepsky/peg/index.html
   7. http://www.messier.seds.org/xtra/Bios/rosse.html
   8. http://messier.seds.org/xtra/history/m-cat.html
   9. https://apod.nasa.gov/apod/ap040701.html
  10. http://spacetelescope.org/images/potw1805a/
  11. https://svs.gsfc.nasa.gov/11149
  12. https://apod.nasa.gov/apod/ap220921.html
  13. https://apod.nasa.gov/apod/archivepix.html
  14. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  15. https://apod.nasa.gov/apod/lib/aptree.html
  16. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  17. https://apod.nasa.gov/apod/calendar/allyears.html
  18. https://apod.nasa.gov/apod.rss
  19. https://apod.nasa.gov/apod/lib/edlinks.html
  20. https://apod.nasa.gov/apod/lib/about_apod.html
  21. http://asterisk.apod.com/discuss_apod.php?date=220922
  22. https://apod.nasa.gov/apod/ap220923.html
  23. http://www.phy.mtu.edu/faculty/Nemiroff.html
  24. http://www.phy.mtu.edu/
  25. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  26. http://www.astro.umd.edu/
  27. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  28. https://www.nasa.gov/about/highlights/HP_Privacy.html
  29. https://astrophysics.gsfc.nasa.gov/
  30. https://www.nasa.gov/
  31. https://www.nasa.gov/centers/goddard/
  32. https://science.nasa.gov/learners
  33. http://www.mtu.edu/