Question

multiple choice 1 point how are the ages of clusters determined? by observing the color of the stars by counting the number of stars by measuring the diameter of the cluster by analyzing the speed of orbiting stars multiple choice 1 point how are open clusters formed? by the collision of stars by the explosion of massive stars from gigantic clouds of gas and dust by the collapse of neutron stars

Explanation:

1. The age of star - clusters can be determined by observing the color of the stars. Different colors of stars correspond to different stages of their life - cycle, which helps in estimating the age of the cluster.
2. Open clusters are formed from gigantic clouds of gas and dust. Gravity causes these clouds to collapse and form stars, leading to the creation of open clusters.

Answer:

1. By observing the color of the stars
2. From gigantic clouds of gas and dust