open cluster

Loose star family

An open cluster is a group of stars that formed together from the same molecular cloud and remain loosely bound by gravity.

Unlike the denser globular clusters, open clusters contain dozens to a few thousand stars and are found in the spiral arms of galaxies: The Pleiades is a famous open cluster visible to the naked eye.

They gradually disperse over hundreds of millions of years.

astronomy

Pleiades

Star cluster in Taurus

Opposites
stellar cluster type

open clusterglobular

Sphere-shaped

Family

open, opening, cluster, opened, opens, openness, opener, reopen, unopened

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