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 10
                                      [2]
                          Halley Dust and Milky Way
                  Image Credit & Copyright [3] : Gang Li [4]

Explanation: Grains of cosmic dust [5]  streaked through the mostly moonless
night skies of May 7. Swept up as planet Earth plowed through the debris
streams left behind by periodic Comet Halley [6] , the annual meteor shower is
known as the Eta Aquarids. Though it was made about a day after the shower's
predicted maximum, this composite image still captures 20 meteors in exposures
taken over a 2 hour period, registered on a background exposure of the sky.
The meteor trails point back to the shower radiant [7]  near eponymous faint
star Eta Aquarii close to the horizon, seen from 100 kilometers south of
Sydney Australia. Known for speed, Eta Aquarid meteors move fast, entering the
atmosphere at about 66 kilometers per second [8] . Brilliant Jupiter shines
near the central bulge of the Milky Way high above the horizon. The Southern
Cross is just tucked in to the upper right corner of the frame [9] .

                      Tomorrow's picture: light-weekend

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    Authors & editors: Robert Nemiroff [21] (MTU [22] ) & Jerry Bonnell [23]
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Site notes:
  [1] archivepix.html
  [2] image/1905/eta_aquarids_Gang.jpg
  [3] lib/about_apod.html#srapply
  [4] mailto: gali8292 [at] uni [dot] sydney [dot] edu [dot] au
  [5] https://earthsky.org/astronomy-essentials/
everything-you-need-to-know-eta-aquarid-meteor-shower
  [6] https://solarsystem.nasa.gov/asteroids-comets...
comets/1p-halley/in-depth/
  [7] ap140424.html
  [8] https://www.google.com/search?q=66+km%2Fs+to+...
  [9] ap190426.html
  [10] ap190509.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] ap190511.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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