Stellar Associations
A stellar association is a very loose star cluster, whose stars share a common origin, but have become gravitationally unbound and are still moving together through space. Associations are primarily identified by their common movement vectors and ages. Identification by chemical composition is also used to factor in association memberships.
Stellar associations were first discovered by the Armenian astronomer Viktor Ambartsumian in 1947. The conventional name for an association uses the names or abbreviations of the constellation (or constellations) in which they are located; the association type, and, sometimes, a numerical identifier.
Read more about this topic: Stellar Kinematics, Kinematic Groups
Famous quotes containing the word associations:
“There is ... no glamor at banquets—I mean the large formal banquets of big associations and societies. There is only a kind of dignified confusion that gradually unhinges the mind.”
—James Thurber (1894–1961)