APOD: 2018 July 29 - Journey to the Center of the Galaxy

                         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 July 29
                     Journey to the Center of the Galaxy
  Video Credit: ESO [2] /MPE/Nick Risinger (skysurvey.org [3] )/ VISTA [4] /J.
                      Emerson/ Digitized Sky Survey 2 [5]

Explanation: What wonders lie at the center of our Galaxy? In Jules Verne [6]
's science fiction classic A Journey to the Center of the Earth [7] ,
Professor Liedenbrock and his fellow explorers encounter many strange and
exciting wonders. Astronomers already know of some of the bizarre objects that
exist at our Galactic center [8] , including like vast cosmic dust clouds [9]
, bright star clusters [10] , swirling rings of gas [11] , and even a
supermassive black hole [12] . Much of the Galactic Center [13]  is shielded
from our view [14]  in visible light by the intervening dust and gas, but it
can be explored using other forms [15]  of electromagnetic radiation [16] .
The featured video [17]  is actually a digital zoom into the Milky Way's
center [18]  which starts by utilizing visible light images from the Digitized
Sky Survey [19] . As the movie [20]  proceeds, the light shown shifts to
dust-penetrating infrared [21] and highlights gas clouds that were recently
discovered in 2013 [22]  to be falling toward central black hole. In 2018 May,
observations [23]  of a star passing near the Milky Way's central black hole
[24]  showed, for the first time [25] , a gravitational redshift [26]  of the
star's light -- as expected from Einstein's general relativity [27] .

                 Highlights: Recent Total Lunar Eclipse [28]
                      Tomorrow's picture: open space [29]

-------------------------------------------------------------------------------
< [30] | Archive [31] | Submissions [32] | Index [33] | Search [34] | Calendar
  [35] | RSS [36] | Education [37] | About APOD [38] | Discuss [39] | > [40]
-------------------------------------------------------------------------------

    Authors & editors: Robert Nemiroff [41] (MTU [42] ) & Jerry Bonnell [43]
                                  (UMCP [44] )
          NASA Official:  Phillip Newman Specific rights apply [45] .
              NASA Web Privacy Policy and Important Notices [46]
              A service of: ASD [47]  at NASA [48]  / GSFC [49]
                           & Michigan Tech. U. [50]
----------
Site notes:
  [1] archivepix.html
  [2] http://www.eso.org/public/
  [3] http://skysurvey.org/
  [4] http://www.eso.org/public/teles-instr/surveyt...
  [5] http://archive.eso.org/dss/dss
  [6] http://www.julesverne.ca/jvlinks.html
  [7] http://jv.gilead.org.il/wolcott/CE-allc/
  [8] ap100831.html
  [9] ap120106.html
  [10] ap071219.html
  [11] ap080427.html
  [12] http://antwrp.gsfc.nasa.gov/apod/ap021018.htm...
  [13] https://public.nrao.edu/gallery/galactic-cent...
  [14]
https://files.ctctcdn.com/3a7f39ae001/aedd769...
  [15] ap030712.html
  [16] https://science.nasa.gov/ems/01_intro
  [17] http://www.eso.org/public/videos/eso1151d/
  [18] http://en.wikipedia.org/wiki/Sgr_A*
  [19] http://archive.eso.org/dss/dss
  [20] https://www.youtube.com/watch?v=FNHexFdacK0
  [21] https://science.nasa.gov/ems/07_infraredwaves
  [22]
http://www.universetoday.com/95982/
gas-cloud-will-collide-with-our-galaxys-black-hole-in-2013/
  [23] http://www2.cnrs.fr/en/3142.htm
  [24] http://eso.org/public/videos/eso1825a/
  [25] http://eso.org/public/news/eso1825/
  [26] https://en.wikipedia.org/wiki/Gravitational_r...
  [27] https://en.wikipedia.org/wiki/General_relativ...
  [28]
https://www.facebook.com/pg/APOD.Sky/photos/
?tab=album&album_id=1520357464735134
  [29] ap180730.html
  [30] ap180728.html
  [31] archivepix.html
  [32] lib/apsubmit2015.html
  [33] lib/aptree.html
  [34] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apo...
  [35] calendar/allyears.html
  [36] /apod.rss
  [37] lib/edlinks.html
  [38] lib/about_apod.html
  [39] http://asterisk.apod.com/discuss_apod.php?dat...
  [40] ap180730.html
  [41] http://www.phy.mtu.edu/faculty/Nemiroff.html
  [42] http://www.phy.mtu.edu/
  [43] https://antwrp.gsfc.nasa.gov/htmltest/jbonnel...
  [44] http://www.astro.umd.edu/
  [45] lib/about_apod.html#srapply
  [46] https://www.nasa.gov/about/highlights/HP_Priv...
  [47] https://astrophysics.gsfc.nasa.gov/
  [48] https://www.nasa.gov/
  [49] https://www.nasa.gov/centers/goddard/
  [50] http://www.mtu.edu/

--- Mystic BBS v1.12 A39 (Windows/32)
 * Origin: FIDONet - The Positronium Repository (1:393/68)