                         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 February 2
                                      [2]
                        LDN 1622: Dark Nebula in Orion
              Image Credit & Copyright [3] : Tapio Lahtinen [4]

Explanation: The silhouette of an intriguing dark nebula [5] inhabits this
cosmic scene. Lynds' Dark Nebula ( LDN [6] ) 1622 appears against a faint
background of glowing hydrogen gas only easily seen in long telescopic
exposures of the region. LDN 1622 lies near the plane of our Milky Way Galaxy,
close on the sky [7]  to Barnard's Loop [8] , a large cloud surrounding the
rich complex of emission nebulae [9]  found in the Belt and Sword of Orion
[10] . But the obscuring dust of LDN 1622 is thought to be much closer than
Orion's more famous nebulae, perhaps only 500 light-years away. At that
distance, this 1 degree wide field of view would span less than 10
light-years. Its foreboding appearance lends this dark expanse a popular name,
the Boogeyman Nebula.

                      Tomorrow's picture: fan of the sky

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Site notes:
  [1] archivepix.html
  [2] image/1902/LDN1622_2019_01_14_1450min_LHaRGB.jpg
  [3] lib/about_apod.html#srapply
  [4] mailto: einarin [at] gmail [dot] com
  [5] http://en.wikipedia.org/wiki/Dark_nebula
  [6] http://heasarc.gsfc.nasa.gov/W3Browse/ nebula-catalog/ldn.html
  [7] ap101023.html
  [8] http://www.messier.seds.org/xtra/ngc/b-loop.html
  [9] ap070125.html
  [10] http://www.gb.nrao.edu/~rmaddale/Education/OrionTourCenter/ optical.html
  [11] ap190201.html
  [12] archivepix.html
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  [22] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [23] http://www.phy.mtu.edu/
  [24] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
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