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.

                                2021 July 22
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                  NGC 7814: Little Sombrero with Supernova
                Image Credit & [3]Copyright: [4]CHART32 Team,

   Explanation: Point your telescope toward the high flying constellation
   [5]Pegasus and you can find this [6]expanse of Milky Way stars and
   distant galaxies. NGC 7814 is centered in the pretty field of view that
   would almost be [7]covered by a full moon. [8]NGC 7814 is sometimes
   called the Little Sombrero for its resemblance to the brighter more
   famous M104, [9]the Sombrero Galaxy. Both Sombrero and Little Sombrero
   are spiral galaxies seen edge-on, and both have extensive halos and
   central bulges cut by a thin disk with thinner dust lanes in
   silhouette. [10]In fact, NGC 7814 is some 40 million light-years away
   and an estimated 60,000 light-years across. That actually makes the
   [11]Little Sombrero about the same physical size as its better known
   namesake, appearing smaller and fainter only because it is farther
   away. In this telescopic view from July 17, NGC 7814 is hosting a newly
   discovered supernova, dominant immediately to the left of the galaxy's
   core. [12]Cataloged as SN 2021rhu, the stellar explosion has been
   identified as a [13]Type Ia supernova, useful toward calibrating the
   [14]distance scale of [15]the universe.

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

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2107/NGC7814withSN2021rhuChart32.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.chart32.de/group
   5. http://www.ianridpath.com/startales/pegasus.htm
   6. http://www.chart32.de/index.php/component/k2/item/226
   7. https://apod.nasa.gov/apod/ap130801.html
   8. http://en.wikipedia.org/wiki/NGC_7814
   9. http://www.youtube.com/watch?v=GBB2xQe8nMw
  10. http://arxiv.org/abs/1105.3867
  11. https://www.nasa.gov/content/goddard/hubbles-little-sombrero
  12. https://www.wis-tns.org/object/2021rhu
  13. https://en.wikipedia.org/wiki/Type_Ia_supernova
  14. https://apod.nasa.gov/debate/debate96.html
  15. https://map.gsfc.nasa.gov/universe/uni_expansion.html
  16. https://apod.nasa.gov/apod/ap210721.html
  17. https://apod.nasa.gov/apod/archivepix.html
  18. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  19. https://apod.nasa.gov/apod/lib/aptree.html
  20. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  21. https://apod.nasa.gov/apod/calendar/allyears.html
  22. https://apod.nasa.gov/apod.rss
  23. https://apod.nasa.gov/apod/lib/edlinks.html
  24. https://apod.nasa.gov/apod/lib/about_apod.html
  25. http://asterisk.apod.com/discuss_apod.php?date=210722
  26. https://apod.nasa.gov/apod/ap210723.html
  27. http://www.phy.mtu.edu/faculty/Nemiroff.html
  28. http://www.phy.mtu.edu/
  29. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  30. http://www.astro.umd.edu/
  31. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  32. https://www.nasa.gov/about/highlights/HP_Privacy.html
  33. https://astrophysics.gsfc.nasa.gov/
  34. https://www.nasa.gov/
  35. https://www.nasa.gov/centers/goddard/
  36. http://www.mtu.edu/