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 29
[2]
M95: Spiral Galaxy with an Inner Ring
Image Credit: NASA [3] , ESA [4] , Hubble [5] , ESO [6] , Amateur Data;
Processing & Copyright: Robert Gendler [7] & Roberto Colombari [8]
Explanation: Why do some spiral galaxies have a ring around the center? First
and foremost, M95 [9] is one of the closer examples of a big and beautiful
barred spiral galaxy [10] . Visible in the featured combination [11] of
images from Hubble [12] and several ground based telescopes are sprawling
spiral arms delineated by open clusters [13] of bright blue stars [14] ,
lanes of dark dust, the diffuse glow of billions of faint stars, and a short
bar [15] across the galaxy center. What intrigues many astronomers, however,
is the circumnuclear ring [16] around the galaxy center visible just outside
the central bar. Although the long term stability of this ring [17] remains a
topic of research [18] , observations indicate its present brightness is at
least enhanced by transient bursts of star formation. M95 [19] , also known as
NGC 3351, spans about 50,000 light-years [20] , lies about 30 million light
years away, and can be seen with a small telescope [21] toward the
constellation of the Lion (Leo [22] ).
Almost Hyperspace: Random APOD Generator [23]
Tomorrow's picture: open space
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Authors & editors: Robert Nemiroff [35] (MTU [36] ) & Jerry Bonnell [37]
(UMCP [38] )
NASA Official: Phillip Newman Specific rights apply [39] .
NASA Web Privacy Policy and Important Notices [40]
A service of: ASD [41] at NASA [42] / GSFC [43]
& Michigan Tech. U. [44]
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Site notes:
[1] archivepix.html
[2] image/1905/M95_HstEsoGendler_1800.jpg
[3] https://www.nasa.gov
[4] https://www.esa.int/
[5] https://www.nasa.gov/mission_pages/hubble/sto...
[6] https://www.eso.org/
[7] http://www.robgendlerastropics.com/
[8] https://www.facebook.com/roberto.colombari
[9] https://en.wikipedia.org/wiki/Messier_95
[10] http://cas.sdss.org/dr6/en/proj/basic/galaxie...
[11] http://www.robgendlerastropics.com/M95-HST-ES...
[12] https://www.spacetelescope.org/about/
[13] open_clusters.html
[14] ap180212.html
[15] ap181009.html
[16] ap170710.html
[17] http://adsabs.harvard.edu/abs/2006ApJ...647.1...
[18] http://adsabs.harvard.edu/abs/2019A%26A...621...
[19] https://www.nasa.gov/feature/goddard/2018/mes...
[20] http://chandra.harvard.edu/photo/cosmic_dista...
[21] http://1funny.com/wp-content/uploads/2010/12/...
[22] https://en.wikipedia.org/wiki/Leo_(constellat...
[23] https://apod.nasa.gov/apod/random_apod.html
[24] ap190528.html
[25] archivepix.html
[26] lib/apsubmit2015.html
[27] lib/aptree.html
[28] https://antwrp.gsfc.nasa.gov/cgi-bin/apod/apo...
[29] calendar/allyears.html
[30] /apod.rss
[31] lib/edlinks.html
[32] lib/about_apod.html
[33] http://asterisk.apod.com/discuss_apod.php?dat...
[34] ap190530.html
[35] http://www.phy.mtu.edu/faculty/Nemiroff.html
[36] http://www.phy.mtu.edu/
[37] https://antwrp.gsfc.nasa.gov/htmltest/jbonnel...
[38] http://www.astro.umd.edu/
[39] lib/about_apod.html#srapply
[40] https://www.nasa.gov/about/highlights/HP_Priv...
[41] https://astrophysics.gsfc.nasa.gov/
[42] https://www.nasa.gov/
[43] https://www.nasa.gov/centers/goddard/
[44] http://www.mtu.edu/
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