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 October 7
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                        NGC 6559: East of the Lagoon
               Image Credit & [3]Copyright: [4]Roberto Sartori

   Explanation: Slide your telescope just east of the Lagoon Nebula to
   find this [5]alluring field of view in the rich starfields of the
   constellation Sagittarius toward the central Milky Way. Of course the
   Lagoon nebula is also known as M8, the eighth object listed in
   [6]Charles Messier's famous catalog of bright nebulae and star
   clusters. [7]Close on the sky but slightly fainter than M8, this
   complex of nebulae was left out of Messier's list though. It contains
   obscuring dust, striking red emission and blue reflection nebulae of
   star-forming region [8]NGC 6559 at right. Like M8, NGC 6559 is located
   about 5,000 light-years away along the edge of a large molecular cloud.
   [9]At that distance, this telescopic frame nearly 3 full moons wide
   would span about 130 light-years.

    Global Moon Party: NASA's Night Sky Network: [10]Saturday, October 9
                 Tomorrow's picture: when stars play guitars
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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/2110/NGC6559Sartori.jpg
   3. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
   4. https://www.astrobin.com/users/robyx/
   5. https://www.astrobin.com/pxnp3i/D/
   6. https://www.nasa.gov/content/explore-the-night-sky-hubble-s-messier-catalog-bio
   7. https://apod.nasa.gov/apod/ap210426.html
   8. https://apod.nasa.gov/apod/ap090802.html
   9. https://arxiv.org/abs/1109.4479
  10. https://nightsky.jpl.nasa.gov/event-view.cfm?Event_ID=117247
  11. https://apod.nasa.gov/apod/ap211006.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=211007
  21. https://apod.nasa.gov/apod/ap211008.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/