Astronomy Picture of the Day
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2003 January 22 
Posted on 01/21/2003 10:37:06 PM PST by petuniasevan
Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.
2003 January 22
Explanation: Many stars like our Sun were formed in open clusters. The above pictured open cluster, M11, contains thousands of stars and is just over five thousand light years distant. The stars in this cluster all formed together about 250 million years ago. The bright young stars in M11 appear blue. Open clusters, also called galactic clusters, contain fewer and younger stars than globular clusters. Also unlike globular clusters, open clusters are generally confined to the plane of our Galaxy. M11 is visible with binoculars towards the constellation of Scutum.
| Right Ascension | 18 : 51.1 (h:m) |
|---|---|
| Declination | -06 : 16 (deg:m) |
| Distance | 6 (kly) |
| Visual Brightness | 6.3 (mag) |
| Apparent Dimension | 14.0 (arc min) |
Here is a wide-angle shot including the cluster:
Finder chart for M11:
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P7, you are entirely too knowledgeable.
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