Which term refers to large groupings of stars

A. Nebulas

B. Galaxies

C. Binary Stars

D. Star Clusters

Answer: D. Star Clusters

Explanation:

A star cluster is a large group of stars. A star cluster can be open cluster or a globular cluster. An open cluster has about 100 to 1000 of stars loosely grouped together. It usually contains new stars.

A globular cluster has thousands of stars tightly grouped together. It usually contains old stars.

A galaxy is a group of stars, dust and gases.

Binary stars are two stars rotating about a common center of mass.

Nebulae are stellar nurseries where stars are born.