              APOD: 2018 July 15 - Rings Around the Ring Nebula

                         Astronomy Picture of the Day

    Discover the cosmos! [1] Each day a different image or photograph of our
 fascinating universe is featured, along with a brief explanation written by a
                           professional astronomer.

                                 2018 July 15
                                      [2]
                        Rings Around the Ring Nebula
  Image Credit: Hubble [3] , Large Binocular Telescope [4] , Subaru Telescope
              [5] ; Composition & Copyright: Robert Gendler [6]

Explanation: There is much more to the familiar Ring Nebula (M57) [7] ,
however, than can be seen through a small telescope. The easily visible
central ring [8]  is about one light-year [9]  across, but this remarkably
deep exposure [10]  - a collaborative effort combining data from three
different large telescopes - explores [11] the looping filaments of glowing
gas extending much farther from the nebula [12] 's central star. This
remarkable composite image [13]  includes narrowband hydrogen image, visible
light emission, and infrared light [14]  emission. Of course, in this
well-studied example of a planetary nebula [15] , the glowing material does
not come from planets. Instead, the gaseous shroud [16]  represents outer
layers [17]  expelled from a dying, sun-like star. The Ring Nebula [18]  is
about 2,000 light-years away toward the musical constellation Lyra [19] .

Open Science: Browse 1,700+ codes in the Astrophysics Source Code Library [20]

                Tomorrow's picture: cosmological neutrino [21]

-------------------------------------------------------------------------------
< [22] | Archive [23] | Submissions [24] | Index [25] | Search [26] | Calendar
  [27] | RSS [28] | Education [29] | About APOD [30] | Discuss [31] | > [32]
-------------------------------------------------------------------------------

    Authors & editors: Robert Nemiroff [33] (MTU [34] ) & Jerry Bonnell [35]
                                  (UMCP [36] )
          NASA Official:  Phillip Newman Specific rights apply [37] .
              NASA Web Privacy Policy and Important Notices [38]
              A service of: ASD [39]  at NASA [40]  / GSFC [41]
                           & Michigan Tech. U. [42]
----------
Site notes:
  [1] archivepix.html
  [2] image/1807/M57Ring_HubbleGendler_3000.jpg
  [3] http://hla.stsci.edu/
  [4] http://www.lbto.org/
  [5] http://www.naoj.org/NAOJ/activities.html
  [6] http://www.robgendlerastropics.com/Biography2.html
  [7] http://en.wikipedia.org/wiki/Ring_nebula
  [8] http://antwrp.gsfc.nasa.gov/apod/image/0303/m57ring_hst_big.jpg
  [9] http://chandra.harvard.edu/photo/cosmic_distance.html
  [10] http://www.robgendlerastropics.com/M57-HST-LBT.html
  [11] http://arxiv.org/abs/astro-ph/0401056
  [12] ap180417.html
  [13] http://www.robgendlerastropics.com/M57-HST-LBT.html
  [14] https://science.nasa.gov/ems/07_infraredwaves
  [15] http://www.noao.edu/jacoby/
  [16] ap030614.html
  [17] https://www.youtube.com/watch?v=6FSIfUYFeTM
  [18] https://www.youtube.com/watch?v=OiYRL3HFULU
  [19] http://www.hawastsoc.org/deepsky/lyr/index.html
  [20] http://ascl.net/code/all
  [21] ap180716.html
  [22] ap180714.html
  [23] archivepix.html
  [24] lib/apsubmit2015.html
  [25] lib/aptree.html
  [26] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [27] calendar/allyears.html
  [28] /apod.rss
  [29] lib/edlinks.html
  [30] lib/about_apod.html
  [31] http://asterisk.apod.com/discuss_apod.php?date=180715
  [32] ap180716.html
  [33] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [34] http://www.phy.mtu.edu/
  [35] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [36] http://www.astro.umd.edu/
  [37] lib/about_apod.html#srapply
  [38] https://www.nasa.gov/about/highlights/HP_Privacy.html
  [39] https://astrophysics.gsfc.nasa.gov/
  [40] https://www.nasa.gov/
  [41] https://www.nasa.gov/centers/goddard/
  [42] http://www.mtu.edu/
