Open Cluster: Molecular Cloud, Gravitation, Irregular Galaxy, Globular Cluster, Star Formation, H II Region, Radiation Pressure, Stellar Evolution
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Описание:
High Quality Content by WIKIPEDIA articles! An open cluster is a group of up to a few thousand stars that were formed from the same giant molecular cloud, and are still loosely gravitationally bound to each other. In contrast, globular clusters are very tightly bound by gravity. Open clusters have been found only in spiral and irregular galaxies, in which active star formation is occurring. They are usually less than a few hundred million years old: they become disrupted by close encounters with other clusters and clouds of gas as they orbit the galactic center, as well as losing cluster members through internal close encounters.Похожие книги
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