Agroup of older stars that cluster together in a spherical shape and can contain up to one million stars per cluster is called:

a. a globular cluster
b. open clusters
c. spherical clusters
d. accretion

answer; i believe the correct answer is (replication is not conservative);

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.