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EarthSky Tonight—Tonight Nov 10, Can we see stars outside our Milky Way galaxy?
Posted By Editor On November 9, 2010 @ 8:51 pm In Earth & Sky | Comments Disabled
Courtesy of EarthSky
A Clear Voice for Science
The answer is no – unless you count seeing the combined light of many billions of stars. From the northern hemisphere, the only galaxy outside our Milky Way that is easily visible to the eye is the great galaxy in the constellation Andromeda – also known as M31. It is shown in the image at the top of this post.
In late November, the Andromeda galaxy is visible from nightfall until about 4 a.m. Tonight, however, the moon will not set  until after midnight.
The Andromeda galaxy will appear as a hazy patch in the night sky, as wide in diameter as a full moon. This haze represents the light of the Andromeda galaxy’s billions of stars. Nevertheless, we still cannot see individual stars within this galaxy — not with the eye alone. Even with amateur telescopes, the patch of light that we see as the Andromeda galaxy looks, at best, like haze. More about M31: great galaxy in Andromeda 
By the way, the image at right shows a second galaxy – M33, in the constellation Triangulum – that some experienced observers have glimpsed with the unaided eye, under perfect sky conditions. The Andromeda galaxy is 2.2 million light-years away. The Triangulum galaxy is only slightly farther away at 2.4 million light-years. Both the Triangulum galaxy (M33) and the Andromeda galaxy are members of our Local Group of galaxies, which also includes our Milky Way Galaxy and about 30 other smaller galaxies.
Like the Andromeda galaxy, M33 one of the most distant objects that can be viewed with the unaided eye.
Written by EarthSky 
CHANDRA Photo Album 
Universe Today 
StarDate Online 
Sky and Telescope 
National Geographic 
Space Com 
Simostronomy Blog 
Amazing Space 
Scope City 
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URLs in this post:
 www.EarthSky.org: http://www.EarthSky.org
 Image: http://www.berthoudrecorder.com/wp-content/uploads/2010/11/phase-10.gif
 Image: http://www.berthoudrecorder.com/wp-content/uploads/2010/11/10nov10_430.jpg
 set: http://earthsky.org/tonightpost/astronomy-essentials/sunrisesunset-moonrisemoonset-almanacs
 Use Great Square of Pegasus to find Andromeda galaxy: http://earthsky.org/tonight/star-hop-in-constellation-andromeda-to-andromeda-galaxy
 Use constellation Cassiopeia to find Andromeda galaxy: http://earthsky.org/tonight/star-hopping-to-the-andromeda-galaxy
 More about M31: great galaxy in Andromeda: http://earthsky.org/tonightpost/clusters-nebulae-galaxies/andromeda-galaxy-closest-spiral-to-milky-way
 EarthSky: http://earthsky.org/author/Earth%20&%20Sky/
 Astronomy Picture of the Day from NASA/JPL: http://antwrp.gsfc.nasa.gov/apod/
 CHANDRA Photo Album: http://chandra.harvard.edu/photo/
 U.S. Naval Observator Astronomical Information cente: http://www.usno.navy.mil/USNO/astronomical-applications/astronomical-information-center/astronomical-information-center
 Universe Today: http://www.universetoday.com/
 StarDate Online: http://stardate.org/
 Sky and Telescope: http://www.skyandtelescope.com/observing/ataglance/
 National Geographic: http://news.nationalgeographic.com/news/
 Space Com: http://www.space.com/nightsky/
 Simostronomy Blog: http://simostronomy.blogspot.com/
 Amazing Space: http://amazing-space.stsci.edu/tonights_sky/
 The York County Astronomical Society: http://www.ycas.org/tonights_sky.htm
 Scope City: http://www.scopecity.net/
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