Question

1. multiple choice 1 point what do you call it when stars cluster together? binary system trinary system globular cluster galactic cluster 2. multiple choice 1 point how are open clusters formed? by the collision of stars by the explosion of massive stars

Explanation:

1. When stars cluster together, they can form different - sized and - structured groups. A cluster of stars is called a star cluster. Among the options, a binary system is a system of two stars, a trinary system is a system of three stars, a globular cluster is a very dense, spherical cluster of stars, and a galactic cluster (also known as an open cluster) is a loosely - bound cluster of stars within a galaxy. The general term for stars clustering together is a star cluster, and from the given options, the most appropriate answer for a general cluster of stars is a globular cluster or a galactic cluster. But if we consider the general concept, a star cluster is the key idea. Here, globular cluster is a type of star cluster.
2. Open clusters are formed from the gravitational collapse of a molecular cloud. They are not formed by the explosion of massive stars (which is a supernova and forms elements and sometimes neutron stars or black holes) or by the collision of stars.

Answer:

1. globular cluster
2. None of the above (as open clusters are formed from the gravitational collapse of a molecular cloud)