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.

                                2018 August 9
                                      [2]
                        Red Planet, Red Moon, and Mars
    Image Credit & Copyright [3] : Alex Cherney (Terrastro [4] , TWAN [5] )

Explanation: Mars is also known as The Red Planet [6] , often seen with a
reddish tinge in dark night skies. Mars shines brightly at the upper left of
this gorgeous morning twilight view from Mornington Peninsula, Victoria,
Australia, but the Moon and planet Earth look redder still. Taken on July 27,
the totally eclipsed Moon is setting. It looks reddened because the Earth's
umbral shadow [7]  isn't completely dark. Instead Earth's shadow is suffused
with a faint red light from all the planet's sunsets and sunrises seen from
the perspective of an eclipsed Moon. [8] The sunsets and sunrises are reddened
because Earth's atmosphere scatters blue light more strongly than red,
creating the faint bluish twilight sky. Of course, craggy seaside [9]  rocks
also take on the reddened colors of this Australian sunrise.

                Tomorrow's picture: bigger than the Milky Way

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    Authors & editors: Robert Nemiroff [21] (MTU [22] ) & Jerry Bonnell [23]
                                  (UMCP [24] )
          NASA Official:  Phillip Newman Specific rights apply [25] .
              NASA Web Privacy Policy and Important Notices [26]
              A service of: ASD [27]  at NASA [28]  / GSFC [29]
                           & Michigan Tech. U. [30]
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Site notes:
  [1] archivepix.html
  [2] image/1808/Cherney_TLE201807.jpg
  [3] lib/about_apod.html#srapply
  [4] http://www.terrastro.com/about/
  [5] http://www.twanight.org/cherney/
  [6] https://mars.nasa.gov/#red_planet/0
  [7] ap180203.html
  [8] https://svs.gsfc.nasa.gov/4341
  [9] ap180802.html
  [10] ap180808.html
  [11] archivepix.html
  [12] lib/apsubmit2015.html
  [13] lib/aptree.html
  [14] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apo...
  [15] calendar/allyears.html
  [16] /apod.rss
  [17] lib/edlinks.html
  [18] lib/about_apod.html
  [19] http://asterisk.apod.com/discuss_apod.php?dat...
  [20] ap180810.html
  [21] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [22] http://www.phy.mtu.edu/
  [23] https://antwrp.gsfc.nasa.gov/htmltest/jbonnel...
  [24] http://www.astro.umd.edu/
  [25] lib/about_apod.html#srapply
  [26] https://www.nasa.gov/about/highlights/HP_Priv...
  [27] https://astrophysics.gsfc.nasa.gov/
  [28] https://www.nasa.gov/
  [29] https://www.nasa.gov/centers/goddard/
  [30] http://www.mtu.edu/

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