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Sky Tonight—January 21, Identify the Winter Circle and winter’s brightest stars
Posted By Editor On January 21, 2011 @ 5:20 am In Earth & Sky | Comments Disabled
Courtesy of EarthSky
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 Tonight’s chart covers a wider area of sky than what we typically show. It is in answer to a reader in Nashville, who wrote, I have heard mention of the Winter Circle  of Stars. Could you list the stars in this circle?
You will find these stars at this time of year by looking east-southeast at early to mid evening.
Again, this is a large pattern and covers a wide area of sky, but as always, it is easiest to start small … in this case, by finding the prominent constellation Orion the Hunter. Orion is very noticeable on these winter evenings. If you pick out any pattern of stars in the east-southeast at nightfall, it will probably be part of Orion. The Winter Circle stars surround Orion. They don’t form a perfect circle … is anything ever perfect? Try starting at Capella  and moving clockwise to Aldebaran , Rigel , Sirius , Procyon , Pollux  and Castor .
This pattern of stars is not a constellation. It is many separate stars in different constellations. In other words, it is what has called an asterism. These same bright stars can be seen before dawn every late summer and early fall. In addition, they can be seen in the evening every winter. Hence the name Winter Circle.
By the way, Betelgeuse , in the shoulder of the constellation Orion, is not part of the Winter Circle. However, you will notice it in this part of the sky, in the middle of the Circle. It appears reddish in color.
The stars of the Winter Circle move westward across the sky during the night, adorning these cold January nights till well after midnight!
Written by EarthSky 
EarthSky: Space 
CHANDRA Photo Album 
Universe Today 
StarDate Online 
Sky and Telescope 
National Geographic 
Space Com 
Simostronomy Blog 
Amazing Space 
Scope City 
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URL to article: http://www.berthoudrecorder.com/2011/01/21/sky-tonight%e2%80%94january-21-identify-the-winter-circle-and-winter%e2%80%99s-brightest-stars/
URLs in this post:
 www.EarthSky.org: http://www.EarthSky.org
 Image: http://www.berthoudrecorder.com/wp-content/uploads/2011/01/phase21.gif
 Image: http://www.berthoudrecorder.com/wp-content/uploads/2011/01/jan21.jpg
 Winter Circle: http://earthsky.org/tonightpost/favorite-star-patterns/winter-circle-highlights-brightest-winter-stars
 Capella: http://earthsky.org/tonightpost/brightest-stars/capella-is-the-stellar-beacon-of-auriga-the-charioteer
 Aldebaran: http://earthsky.org/tonightpost/brightest-stars/aldebaran-is-taurus-bloodshot-eye
 Rigel: http://earthsky.org/tonightpost/brightest-stars/blue-white-rigel-is-orions-brightest-star
 Sirius: http://earthsky.org/tonightpost/brightest-stars/sirius-the-brightest-star
 Procyon: http://earthsky.org/tonightpost/brightest-stars/procyon-harbringer-of-the-dog-star
 Pollux: http://earthsky.org/tonightpost/brightest-stars/pollux-not-castor-is-geminis-brightest-star
 Castor: http://earthsky.org/tonightpost/brightest-stars/best-castor-brightest-second-magnitude-star
 Betelgeuse: http://earthsky.org/tonightpost/brightest-stars/betelgeuse-will-explode-someday
 EarthSky: http://earthsky.org/author/Earth%20&%20Sky/
 Astronomy Picture of the Day from NASA/JPL: http://antwrp.gsfc.nasa.gov/apod/
 EarthSky: Space: http://earthsky.org/space
 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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