METROPOLITAN SKIES
By Dave Trapani
SkyRunner
S
ky
Conditions
Star Clusters & Stars
Many stars occur in associations called "star clusters". Astronomers divide star clusters into two
broad categories: Open Clusters (also called Galactic Clusters), in which there are a few (typically
tens to thousands of) young stars and individual stars are easily resolved, and Globular Clusters,
which are much older, contain many more stars (typically 100,000 to 1,000,000), and in which the
central density is sufficiently high that we cannot resolve individual stars from earth-based
telescopes (hence they appear as a "glob" of light).
2007
M48- 2/24, 2007
M37- 2/24, 2007
2006
M39 - August 8, 2006
M52- August 8, 2006
Albireo- August 3, 2006
BACK
TO TOP
M44 - April 18, 2006
M13 - July 23, 2006
February 07, 2006
M13 - July 31, 2006
2005
September 9, 2005
November 12, 2005
September 9, 2005
December 27, 2005
September 9, 2005
2004
June 23, 2004
June 23, 2004
August 25, 2004
© 2015 David A. Trapani
MetropolitanSkies.com
All Rights Reserved
NGC 869 - 10/28/2007
2008
M45 - 1/30/2008
M13 - 4/30/2008
M11 - 7/4/2008
M13- 8/16/2008
M15 - 8/30/2008
M44 - 2/13/2009
2009
2010
M37 - 4/2/2010
2014
M45 The Pleides
11/21/14