OB association
C16107
concept
An OB association is a loose, gravitationally unbound group of young, massive O- and B-type stars that formed together in the same region of a galaxy.
Observed surface forms (1)
- OB subgroup ×3
Instances (14)
- Perseus OB2 association
- Scorpius–Centaurus OB association
- Cassiopeia OB associations
- Monoceros OB2 association
- Orion OB association
-
BD+30 540
surface form: Perseus OB2 association
- Vela OB2 association
- Sagittarius OB association region
- Cygnus OB2 association
- Serpens OB1 association
- Cepheus OB2 association
- Upper Scorpius via concept surface "OB subgroup"
- Lower Centaurus–Crux via concept surface "OB subgroup"
- Upper Centaurus–Lupus via concept surface "OB subgroup"