In astronomy, an open cluster family is a group of approximately coeval (age range ∼ {\displaystyle \sim } 30 Myr) young open star clusters located in a relatively small region of the Galactic disk (radius ∼ {\displaystyle \sim } 250 pc). == Introduction == Open clusters do not form in isolation but in complexes (Efremov 1978), within star forming regions.
In astronomy, an open cluster family is a group of approximately coeval (age range ∼ {\displaystyle \sim } 30 Myr) young open star clusters located in a relatively small region of the Galactic disk (radius ∼ {\displaystyle \sim } 250 pc). == Introduction == Open clusters do not form in isolation but in complexes (Efremov 1978), within star forming regions.
Source: Wikipedia "Open cluster family" · CC BY-SA 4.0
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