Astronomy Picture of the Day

                         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.

                                 2019 April 7
                                      [2]
                          A Scorpius Sky Spectacular
          Image Credit & Copyright: StΘphane Guisard [3] , TWAN [4]

Explanation: If Scorpius looked this good to the unaided eye, humans might
remember it better. Scorpius [5] more typically appears as a few bright stars
in a well-known but rarely pointed out zodiacal [6] constellation [7] . To get
a spectacular image like this [8] , though, one needs a good camera [9] ,
color filters [10] , and a digital image processor [11] . To bring out detail,
the featured image [12]  not only involved long duration exposures taken in
several colors, but one exposure in a very specific red color [13]  emitted by
hydrogen [14] . The resulting image [15]  shows many breathtaking features.
Vertically across the image left is part of the plane [16]  of our Milky Way
Galaxy [17] . Visible there are vast clouds of bright stars and long filaments
of dark dust [18] . Jutting out diagonally from the Milky Way [19]  in the
image center are dark dust bands known as the Dark River [20] . This river
connects to several bright stars on the right that are part of Scorpius' head
and claws [21] , and include the bright star Antares [22] . Above and right of
Antares is an even brighter planet: Jupiter. Numerous red emission nebulas
[23]  and blue reflection nebulas [24] are visible throughout the image.
Scorpius [25] appears prominently in southern skies after sunset during the
middle of the year.

                    Tomorrow's picture: saturnian surprise

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    Authors & editors: Robert Nemiroff [37] (MTU [38] ) & Jerry Bonnell [39]
                                  (UMCP [40] )
          NASA Official:  Phillip Newman Specific rights apply [41] .
              NASA Web Privacy Policy and Important Notices [42]
              A service of: ASD [43]  at NASA [44]  / GSFC [45]
                           & Michigan Tech. U. [46]
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Site notes:
  [1] archivepix.html
  [2] image/1904/scorpio_guisard_1328.jpg
  [3] http://sguisard.astrosurf.com/
  [4] http://www.twanight.org/newTWAN/index.asp
  [5] http://www.allthesky.com/constellations/scorp...
  [6] http://en.wikipedia.org/wiki/Zodiac
  [7] http://modernconstellations.com/constellation...
  [8]
http://astrosurf.com/sguisard/Pagim/Scorpius_...
  [9] http://electronics.howstuffworks.com/digital-...
  [10] http://en.wikipedia.org/wiki/Filter_%28optics...
  [11] http://reed.cs.depaul.edu/peterh/class/hci450...
  [12]
http://astrosurf.com/sguisard/Pagim/Scorpius_...
  [13] ap050930.html
  [14] http://periodic.lanl.gov/1.shtml
  [15]
http://astrosurf.com/sguisard/Pagim/Scorpius_...
  [16] ap050605.html
  [17] http://en.wikipedia.org/wiki/Milky_Way
  [18] ap030706.html
  [19] https://solarsystem.nasa.gov/resources/285/th...
  [20] ap090708.html
  [21] http://www.ianridpath.com/startales/scorpius....
  [22] http://stars.astro.illinois.edu/sow/antares.h...
  [23] emission_nebulae.html
  [24] http://en.wikipedia.org/wiki/Reflection_nebul...
  [25] http://en.wikipedia.org/wiki/Scorpion
  [26] ap190406.html
  [27] archivepix.html
  [28] lib/apsubmit2015.html
  [29] lib/aptree.html
  [30] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apo...
  [31] calendar/allyears.html
  [32] /apod.rss
  [33] lib/edlinks.html
  [34] lib/about_apod.html
  [35] http://asterisk.apod.com/discuss_apod.php?dat...
  [36] ap190408.html
  [37] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [38] http://www.phy.mtu.edu/
  [39] https://antwrp.gsfc.nasa.gov/htmltest/jbonnel...
  [40] http://www.astro.umd.edu/
  [41] lib/about_apod.html#srapply
  [42] https://www.nasa.gov/about/highlights/HP_Priv...
  [43] https://astrophysics.gsfc.nasa.gov/
  [44] https://www.nasa.gov/
  [45] https://www.nasa.gov/centers/goddard/
  [46] http://www.mtu.edu/

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