What is the name for groups of tens to hundreds of thousands of stars?
elliptical clusters
nebuli
constellations
globular clusters
Globular clusters ( Figure below ) are groups of tens to hundreds of thousands of stars. Gravity holds these stars tightly together. Globular clusters have a definite, spherical shape. They contain mostly old, reddish stars. Near the center of a globular cluster, the stars are closer together. The heart of the globular cluster M13 has hundreds of thousands of stars. M13 is 145 light years in diameter. The cluster contains red and blue giant stars.