Astrophysics (index)about

OB Association

(stellar association with O or B class stars)

An OB Association is a Stellar Association, a loose group of stars of similar Spectral Class including O-Type Star and early B-Type Star stars.

An example is the Scorpius-Centaurus Association, which is the nearest to us, about 380-470 light-years, thus of interest for observation.


Referenced by:
Stellar Association
CTIO Upper-Scorpius OB Association Survey (UScoCTIO)