Gould Belt

[1] It contains many O- and B-type stars, and many of the nearest star-forming regions of the local Orion Arm, to which the Sun belongs.

The relative proximity of these star-forming regions spurred the Gould Belt Survey project to determine what caused them.

[2] The belt contains bright, young stars which formed about 30 to 50 million years ago in several constellations.

Star-forming regions and OB associations that make up this region include the Orion Nebula and the Orion molecular clouds, the Scorpius–Centaurus OB association, Cepheus OB2, Perseus OB2, and the Taurus–Auriga molecular clouds.

A theory proposed around 2009 suggests that the Gould Belt formed about 30 million years ago when a blob of dark matter collided with the molecular cloud in our region.