OB associations

Alternative definitions (0), class: vernacular (0)
Term: OB associations

A loosely bound grouping of O and B stars that typically stretches up to several hundred light-years and may contain between a dozen and several hundred O stars and B stars. The members of an OB association are young and of roughly the same age. OB associations dissipate in a few tens of millions of years.

Created 2023.04.16
Last Modified 2023.04.16
Contributed by Ryan McGranaghan