Owing to its relative closeness and complexity it is the most closely studied OB association.

This is the nearest OB association to the Sun, with the LCC component having an age in the range of 16-20 million years.

Inside OB associations, the stars are close enough that their wind bubbles merge, forming a giant bubble called a superbubble.

OB association is a group of massive stars that are not gravitationally bound to each other, but move together through space in a loose association.

Because of the selection for young stars and nebulae, the survey will also increase the number of known OB associations, and other clusters.

Most of the bright stars are massive members of the nearest OB association: Scorpius-Centaurus.

It is believed that the majority of all stars in the Milky Way were formed in OB associations.

As a result, OB associations are generally only a few million years in age or less.

The Hipparcos satellite provided measurements that located a dozen OB associations within 650 parsecs of the Sun.

You spent much of your first year in the DQ passing through a long, narrow OB association.