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 November 29
                                      [2]
                           Across Corona Australis
                Image Credit & Copyright [3] : Fabian Neyer [4]

Explanation: Cosmic dust clouds are draped across a rich field of stars in
this broad telescopic panorama [5]  near the northern boundary of Corona
Australis [6] , the Southern Crown. Less than 500 light-years away the denser
clouds effectively block light [7]  from more distant background stars in the
Milky Way [8] . The entire vista spans about 5 degrees or nearly 45
light-years at the clouds' estimated distance. Toward the right lies a group
of bluish reflection nebulae cataloged as NGC 6726, 6727, 6729 and IC 4812 [9]
. The characteristic blue color is produced as light from hot stars is
reflected by [10] the cosmic dust. The dust also obscures from view stars in
the region [11] still in the process of formation. Smaller yellowish nebula
NGC 6729 surrounds young [12]  variable star R Coronae Australis [13] . Below
it are arcs and loops identified as Herbig Haro (HH) objects [14] associated
with energetic newborn stars. Magnificent globular star cluster [15]  NGC 6723
is above and right of the nebulae. Though NGC 6723 appears to be part of the
group [16] , its ancient stars actually lie nearly 30,000 light-years away,
far beyond the young stars of the Corona Australis dust clouds [17] .

                      Tomorrow's picture: river to Orion

-------------------------------------------------------------------------------
< [18] | Archive [19] | Submissions [20] | Index [21] | Search [22] | Calendar
  [23] | RSS [24] | Education [25] | About APOD [26] | Discuss [27] | > [28]
-------------------------------------------------------------------------------

    Authors & editors: Robert Nemiroff [29] (MTU [30] ) & Jerry Bonnell [31]
                                  (UMCP [32] )
          NASA Official:  Phillip Newman Specific rights apply [33] .
              NASA Web Privacy Policy and Important Notices [34]
              A service of: ASD [35]  at NASA [36]  / GSFC [37]
                           & Michigan Tech. U. [38]
----------
Site notes:
  [1] archivepix.html
  [2] image/1811/coronaAustralis_l1500.jpg
  [3] lib/about_apod.html#srapply
  [4] http://www.starpointing.com/
  [5] http://www.starpointing.com/ccd/coronaAustralis.html
  [6] http://www.botproductions.com/stellar/ corona_australis.html
  [7] ap090425.html
  [8] http://members.nova.org/~sol/chview/chv5.htm
  [9] image/1811/coronaAustralis_lbl1500.jpg
  [10] ap011228.html
  [11] http://arxiv.org/abs/1211.6945
  [12] ap031226.html
  [13] http://www.solstation.com/stars/r-coraus.htm
  [14] ap111027.html
  [15] ap120614.html
  [16] http://photojournal.jpl.nasa.gov/catalog/PIA13064
  [17] http://www.eso.org/public/videos/ eso1109a/
  [18] ap181128.html
  [19] archivepix.html
  [20] lib/apsubmit2015.html
  [21] lib/aptree.html
  [22] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apod_search
  [23] calendar/allyears.html
  [24] /apod.rss
  [25] lib/edlinks.html
  [26] lib/about_apod.html
  [27] http://asterisk.apod.com/discuss_apod.php?date=181129
  [28] ap181130.html
  [29] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [30] http://www.phy.mtu.edu/
  [31] https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
  [32] http://www.astro.umd.edu/
  [33] lib/about_apod.html#srapply
  [34] https://www.nasa.gov/about/highlights/HP_Privacy.html
  [35] https://astrophysics.gsfc.nasa.gov/
  [36] https://www.nasa.gov/
  [37] https://www.nasa.gov/centers/goddard/
  [38] http://www.mtu.edu/

--- Mystic BBS v1.12 A39 (Windows/32)