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 October 23
    [2]See Explanation. Clicking on the picture will download the highest
                        resolution version available.

                            Supernova in NGC 2525
    Image Credit: [3]NASA, [4]ESA, A. Riess ([5]STScI/JHU) and the SH0ES
                                    team
                  Acknowledgment: M. Zamani ([6]ESA/Hubble)

   Explanation: Big, beautiful, barred [7]spiral galaxy NGC 2525 lies 70
   million light-years from the Milky Way. It shines in Earth's night sky
   within the boundaries of the southern constellation Puppis. About
   60,000 light-years across, its spiral arms lined with dark dust clouds,
   massive blue stars, and pinkish starforming regions wind through this
   gorgeous Hubble Space Telescope snapshot. Spotted on the outskirts of
   NGC 2525 in January 2018, supernova SN 2018gv is the brightest star in
   the frame at the lower left. [8]In time-lapse, a year long series of
   [9]Hubble observations followed the stellar explosion, the nuclear
   detonation of a white dwarf star triggered by accreting material from a
   companion star, as it slowly faded from view. Identified as a [10]Type
   Ia supernova, its brightness is considered a cosmic [11]standard
   candle. Type Ia supernovae are used to measure distances to galaxies
   and determine the [12]expansion rate of the Universe.

                      Tomorrow's picture: light-weekend
     __________________________________________________________________

      [13]< | [14]Archive | [15]Submissions | [16]Index | [17]Search |
   [18]Calendar | [19]RSS | [20]Education | [21]About APOD | [22]Discuss |
                                    [23]>
     __________________________________________________________________

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

References

   1. https://apod.nasa.gov/apod/archivepix.html
   2. https://apod.nasa.gov/apod/image/2010/STScI_NGC2525_1865x2000.jpg
   3. https://www.nasa.gov/
   4. https://www.spacetelescope.org/
   5. http://www.stsci.edu/
   6. http://www.spacetelescope.org/
   7. https://hubblesite.org/contents/media/images/2020/52/4747-Image
   8. https://hubblesite.org/contents/media/videos/2020/52/1288-Video
   9. https://hubblesite.org/contents/news-releases/2020/news-2020-52
  10. https://en.wikipedia.org/wiki/Type_Ia_supernova
  11. https://en.wikipedia.org/wiki/Cosmic_distance_ladder#Standard_candles
  12. https://www.nasa.gov/feature/goddard/2019/mystery-of-the-universe-s-expansion-rate-widens-with-new-hubble-data
  13. https://apod.nasa.gov/apod/ap201022.html
  14. https://apod.nasa.gov/apod/archivepix.html
  15. https://apod.nasa.gov/apod/lib/apsubmit2015.html
  16. https://apod.nasa.gov/apod/lib/aptree.html
  17. https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  18. https://apod.nasa.gov/apod/calendar/allyears.html
  19. https://apod.nasa.gov/apod.rss
  20. https://apod.nasa.gov/apod/lib/edlinks.html
  21. https://apod.nasa.gov/apod/lib/about_apod.html
  22. http://asterisk.apod.com/discuss_apod.php?date=201023
  23. https://apod.nasa.gov/apod/ap201024.html
  24. http://www.phy.mtu.edu/faculty/Nemiroff.html
  25. http://www.phy.mtu.edu/
  26. https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  27. http://www.astro.umd.edu/
  28. https://apod.nasa.gov/apod/lib/about_apod.html#srapply
  29. https://www.nasa.gov/about/highlights/HP_Privacy.html
  30. https://astrophysics.gsfc.nasa.gov/
  31. https://www.nasa.gov/
  32. https://www.nasa.gov/centers/goddard/
  33. http://www.mtu.edu/