This star-studded picture shows us a part of Messier 11, an open star cluster in the southern Suzorye & # 39; and Scutum (shield). Messier 11, also known as the Wild Duck Cluster, as its brightest stars form the shape of "V", which is somewhat reminiscent of a flock of ducks in flight.
Messier 11 & # 39 is one of the richest and most compact open clusters currently known. Studying the brightest, hottest main sequence stars in the cluster, astronomers believe that it formed about 220 million years ago. Open clusters tend to contain fewer and younger stars than their more compact globular cousin, and Messier 11 not out & # 39 is an exception: in the center are a lot of blue stars, the hottest and youngest of thousands of stellar residents of the cluster.
The life expectancy of open clusters and the relatively short compared with the globular thereof; stars in large numbers scattered far from each other and, therefore, is not so much related to each other by gravity, causing them to be more easily and quickly distracted by strong gravitational forces. As a result, by Messier 11, is likely to differ in a few million years, because its members are released one by one, moved away from the other heavenly about the & # 39 objects in the vicinity.
Messier 11 is shown in the Hubble's Messier catalog, which includes some of the most interesting on the & # 39 objects that can be observed in the Northern Hemisphere & # 39; and the earth.
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