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 May 31
                                      [2]
                            Lynds Dark Nebula 1251
   Image Credit & Copyright [3] : Francesco Sferlazza [4] , Franco Sgueglia,
                               Astro Brallo [5]

Explanation: Stars are forming in Lynds Dark Nebula (LDN [6] ) 1251. About
1,000 light-years away and drifting above the plane of our Milky Way galaxy,
the dusty molecular cloud is part of a complex of dark nebulae mapped toward
the Cepheus flare [7]  region. Across the spectrum [8] , astronomical
explorations of the obscuring interstellar clouds reveal energetic shocks and
outflows associated with newborn stars, including the telltale reddish glow
from scattered Herbig-Haro [9]  objects seen in this sharp image. Distant
background galaxies also lurk on the scene, visually buried behind the dusty
expanse. The deep telescopic field of view imaged with broadband filters spans
about two full moons on the sky, or 17 light-years at the estimated distance
of LDN 1251.

                      Tomorrow's picture: light-weekend

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Site notes:
  [1] archivepix.html
  [2] image/1905/ldn1251.jpg
  [3] lib/about_apod.html#srapply
  [4] mailto: sferlazza @at@ gmail .dot. com
  [5] http://www.astrobrallo.com/site/
  [6] http://adsabs.harvard.edu/abs/1962ApJS....7....1L
  [7] https://arxiv.org/abs/0809.4761
  [8] https://arxiv.org/abs/1503.02934
  [9] https://en.wikipedia.org/wiki/ Herbig%E2%80%93Haro_object
  [10] ap190530.html
  [11] archivepix.html
  [12] lib/apsubmit2015.html
  [13] lib/aptree.html
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  [15] calendar/allyears.html
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  [19] http://asterisk.apod.com/discuss_apod.php?date=190531
  [20] ap190601.html
  [21] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [22] http://www.phy.mtu.edu/
  [23] http://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
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  [25] lib/about_apod.html#srapply
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