            APOD: 2018 January 20 - Old Moon in the New Moon s Arms

                         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 January 20
                                      [2]
                       Old Moon in the New Moon's Arms
  Image Credit & Copyright [3] : Yuri Beletsky [4] (Carnegie [5] Las Campanas
                         Observatory [6] , TWAN [7] )

Explanation: Also known as the Moon's "ashen glow" or the "Old Moon in the New
Moon's arms", earthshine is [8]  earthlight reflected from the Moon's night
side. This stunning image of earthshine from a young crescent moon was taken
from Las Campanas Observatory, Atacama Desert, Chile, planet Earth [9] near
moonset on January 18. Dramatic atmospheric inversion layers appear [10]
above the Pacific Ocean, colored by the sunset at the planet's western
horizon. But the view from the Moon would have been stunning, too. When the
Moon appears in Earth's sky as a slender crescent, a dazzlingly bright, nearly
full Earth would be seen from the lunar surface. A description of earthshine,
in terms of sunlight reflected by Earth's oceans in turn illuminating the
Moon's dark surface, was written 500 years ago by Leonardo da Vinci [11] .

                  Tomorrow's picture: electric blizzard [12]

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    Authors & editors: Robert Nemiroff [24] (MTU [25] ) & Jerry Bonnell [26]
                                  (UMCP [27] )
          NASA Official:  Phillip Newman Specific rights apply [28] .
              NASA Web Privacy Policy and Important Notices [29]
              A service of: ASD [30]  at NASA [31]  / GSFC [32]
                           & Michigan Tech. U. [33]
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Site notes:
  [1] archivepix.html
  [2] image/1801/moonsetLasCampanas_beletsky.jpg
  [3] lib/about_apod.html#srapply
  [4] https://www.instagram.com/yuribeletsky/
  [5] http://carnegiescience.edu/
  [6] http://www.lco.cl/
  [7] http://www.twanight.org/
  [8] https://earthobservatory.nasa.gov/IOTD/view.php?id=83782
  [9] https://en.wikipedia.org/wiki/Planetshine
  [10] ap170120.html
  [11] https://science.nasa.gov/science-news/
science-at-nasa/2005/04oct_leonardo
  [12] ap180121.html
  [13] ap180119.html
  [14] archivepix.html
  [15] lib/apsubmit2015.html
  [16] lib/aptree.html
  [17] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [18] calendar/allyears.html
  [19] /apod.rss
  [20] lib/edlinks.html
  [21] lib/about_apod.html
  [22] http://asterisk.apod.com/discuss_apod.php?date=180120
  [23] ap180121.html
  [24] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [25] http://www.phy.mtu.edu/
  [26] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [27] http://www.astro.umd.edu/
  [28] lib/about_apod.html#srapply
  [29] https://www.nasa.gov/about/highlights/HP_Privacy.html
  [30] https://astrophysics.gsfc.nasa.gov/
  [31] https://www.nasa.gov/
  [32] https://www.nasa.gov/centers/goddard/
  [33] http://www.mtu.edu/
