              APOD: 2018 March 26 - The Coma Cluster of Galaxies

                         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 March 26
                                      [2]
                        The Coma Cluster of Galaxies
  Image Credit: Russ Carroll [3] , Robert Gendler [4] , & Bob Franke [5] ; Dan
                        Zowada Memorial Observatory [6]

Explanation: Almost every object in the above photograph is a galaxy. The Coma
Cluster of Galaxies [7]  pictured here is one of the densest clusters [8]
known - it contains thousands of galaxies [9] . Each of these galaxies [10]
houses billions of stars - just as our own Milky Way Galaxy [11]  does.
Although nearby when compared to most other clusters [12] , light from the
Coma Cluster [13] still takes hundreds of millions of years to reach us. In
fact, the Coma Cluster [14]  is so big it takes light millions of years just
to go from one side to the other. Most galaxies in Coma [15]  and other
clusters are ellipticals [16] , while most galaxies [17]  outside of clusters
are spirals [18] . The nature of Coma's X-ray emission [19]  is still being
investigated [20] .

                    Tomorrow's picture: visiting mars [21]

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    Authors & editors: Robert Nemiroff [33] (MTU [34] ) & Jerry Bonnell [35]
                                  (UMCP [36] )
          NASA Official:  Phillip Newman Specific rights apply [37] .
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              A service of: ASD [39]  at NASA [40]  / GSFC [41]
                           & Michigan Tech. U. [42]
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Site notes:
  [1] archivepix.html
  [2] image/1803/ComaCluster_Carroll_1024.jpg
  [3] mailto: russ92069 @at@ me .dot. com
  [4] http://www.robgendlerastropics.com/
  [5] http://bf-astro.com/
  [6] https://www.facebook.com/groups/984543151582914/about/
  [7] https://en.wikipedia.org/wiki/Coma_Cluster
  [8] http://www.astr.ua.edu/white/mug/cluster/clusters.html
  [9] https://science.nasa.gov/astrophysics/focus-areas/what-are-galaxies
  [10] https://www.youtube.com/watch?v=nh7aS5__b4k
  [11] https://imagine.gsfc.nasa.gov/science/objects/milkyway1.html
  [12] clusters_of_galaxies.html
  [13] ap080616.html
  [14] http://www.wikisky.org/?object=Coma+Cluster&zoom=9&img_source=DSS2
  [15] https://en.wikipedia.org/wiki/Coma_Berenices
  [16] elliptical_galaxies.html
  [17] http://www.galaxyzoo.org/
  [18] spiral_galaxies.html
  [19] https://en.wikipedia.org/wiki/Coma_Cluster#X-ray_source
  [20] http://adsabs.harvard.edu/abs/2000A%26A...357...66D
  [21] ap180327.html
  [22] ap180325.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=180326
  [32] ap180327.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/
