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 September 8
                                      [2]
                              Real Time Perseid
        Video Credit & Copyright [3] : Till Credner, AlltheSky.com [4]

Explanation: Bright meteors [5]  and dark night skies made this year's Perseid
meteor shower a great time for a weekend campout. And while packing away their
equipment, skygazers at a campsite in the mountains of southern Germany found
at least one more reason to linger under the stars, witnessing this brief but
colorful flash with their own eyes. Presented as a 50 frame gif [6] , the two
second long video was captured during the morning twilight of August 12. In
real time it shows the development of the typical [7]  green train of a bright
Perseid meteor. A much fainter Perseid is just visible farther to the right.
Plowing through [8] Earth's atmosphere at 60 kilometers per second, Perseids
are fast enough to excite the characteristic green emission of atomic oxygen
at altitudes of 100 kilometers or so.

                    Tomorrow's picture: cosmic crustacean

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    Authors & editors: Robert Nemiroff [20] (MTU [21] ) & Jerry Bonnell [22]
                                  (UMCP [23] )
          NASA Official:  Phillip Newman Specific rights apply [24] .
              NASA Web Privacy Policy and Important Notices [25]
              A service of: ASD [26]  at NASA [27]  / GSFC [28]
                           & Michigan Tech. U. [29]
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Site notes:
  [1] archivepix.html
  [2] image/1809/perseid11aug18-p.gif
  [3] lib/about_apod.html#srapply
  [4] http://www.allthesky.com/
  [5] https://blogs.nasa.gov/Watch_the_Skies/tag/al...
  [6] http://www.allthesky.de/atmosphere/ perseid11aug18.html
  [7] ap180817.html
  [8] ap180816.html
  [9] ap180907.html
  [10] archivepix.html
  [11] lib/apsubmit2015.html
  [12] lib/aptree.html
  [13] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apo...
  [14] calendar/allyears.html
  [15] /apod.rss
  [16] lib/edlinks.html
  [17] lib/about_apod.html
  [18] http://asterisk.apod.com/discuss_apod.php?dat...
  [19] ap180909.html
  [20] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [21] http://www.phy.mtu.edu/
  [22] https://antwrp.gsfc.nasa.gov/htmltest/jbonnel...
  [23] http://www.astro.umd.edu/
  [24] lib/about_apod.html#srapply
  [25] https://www.nasa.gov/about/highlights/HP_Priv...
  [26] https://astrophysics.gsfc.nasa.gov/
  [27] https://www.nasa.gov/
  [28] https://www.nasa.gov/centers/goddard/
  [29] http://www.mtu.edu/

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