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Earthsky Tonight—May 06, Milky Way encircles the horizon on May evenings
Posted By Gary Wamsley On May 5, 2010 @ 11:00 pm In Earth & Sky | Comments Disabled
Courtesy of EarthSky
A Clear Voice for Science
The disk of our Milky Way is shaped like a pancake. On May evenings, the plane of the pancake-shaped galactic disk coincides with the plane of the horizon. Because the Milky Way disk sits along the horizon in every direction, the Milky Way doesn’t appear in the sky on May evenings.
The galactic disk most closely aligns with the horizon at about 30 degrees north latitude – the latitude of St. Augustine, Florida. Appreciably north of this latitude, the galactic disk tilts a bit upward of the northern horizon. Appreciably south of 30 degrees north latitude, the galactic disk tilts a bit above the southern horizon. Even so, the Milky Way is pretty much out of sight.
Like the sun, the stars rise in the east and set in the west. If you stay up until after midnight, you will eventually see the stars of the Summer Triangle  – Deneb, Vega and Altair – rising above your eastern horizon. In a dark country sky, the Milky Way’s band of stars becomes visible as well, for the Milky Way passes right through this triangle of stars.
Written by Bruce McClure
StarDate Online 
National Geographic 
Space Com 
Amazing Space 
Scope City 
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URL to article: http://www.berthoudrecorder.com/2010/05/05/earthsky-tonight%e2%80%94may-06-milky-way-encircles-the-horizon-on-may-evenings/
URLs in this post:
 www.EarthSky.org: http://www.EarthSky.org
 Image: http://www.berthoudrecorder.com/wp-content/uploads/2010/05/phase-06.gif
 Image: http://www.berthoudrecorder.com/wp-content/uploads/2010/05/10may06_4301.jpg
 Summer Triangle: http://earthsky.org/tonightpost/favorite-star-patterns/the-summer-triangle-roadmap-to-the-milky-way
 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
 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/
 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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