                 APOD: 2017 November 2 - NGC 891 vs Abell 347

                         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.

                                2017 November 2
                                      [2]
                            NGC 891 vs Abell 347
                Image Credit & Copyright [3] : Laszlo Bagi [4]

Explanation: Distant galaxies lie beyond a foreground of spiky Milky Way stars
in this telescopic field of view [5] . Centered on yellowish star HD 14771,
the scene spans about 1 degree on the sky toward the northern constellation
Andromeda. At top right is large spiral galaxy NGC 891, 100 thousand
light-years across and seen almost exactly edge-on [6] . About 30 million
light-years distant, NGC 891 looks a lot like our own Milky Way with a
flattened, thin, galactic disk. Its disk and central bulge are cut along the
middle [7]  by dark, obscuring dust clouds. Scattered toward the lower left
are members of galaxy cluster [8]  Abell 347. Nearly 240 million light-years
away, Abell 347 [9]  shows off its own large galaxies in the sharp image. They
are similar to NGC 891 in physical size but located almost 8 times farther
away, so Abell 347 galaxies have roughly one eighth the apparent size [10] of
NGC 891.

                   Tomorrow's picture: pixels in space [11]

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Site notes:
  [1] archivepix.html
  [2] image/1711/Ngc891Bagi.jpg
  [3] lib/about_apod.html#srapply
  [4] http://www.bagil.hu
  [5] http://www.bagil.hu/index.php/fotogaleria
  [6] ap131011.html
  [7] ap110520.html
  [8] http://www.jpl.nasa.gov/news/news.php?release=2014-007
  [9] http://www.astronomy-mall.com/Adventures.In.Deep.Space/ agc347ch.htm
  [10] http://chandra.harvard.edu/photo/scale.html
  [11] ap171103.html
  [12] ap171101.html
  [13] archivepix.html
  [14] lib/apsubmit2015.html
  [15] lib/aptree.html
  [16] http://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [17] calendar/allyears.html
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  [19] lib/edlinks.html
  [20] lib/about_apod.html
  [21] http://asterisk.apod.com/discuss_apod.php?date=171102
  [22] ap171103.html
  [23] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [24] http://www.phy.mtu.edu/
  [25] http://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [26] http://www.astro.umd.edu/
  [27] lib/about_apod.html#srapply
  [28] http://www.nasa.gov/about/highlights/HP_Privacy.html
  [29] http://astrophysics.gsfc.nasa.gov/
  [30] http://www.nasa.gov/
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  [32] http://www.mtu.edu/
