Star Clusters Quiz

What are star clusters?

• Groupings of stars that formed together and stick together due to mutual gravitational attraction

• Individual stars that travel alone in the galaxy

• Planets that orbit around a single star

• Galaxies that contain billions of stars

What is a characteristic of open clusters?

• They contain very old stars

• They are tightly packed with stars

• They have an open, transparent appearance

• They are located in a galaxy's halo

Where are globular clusters located?

• In the spiral arms of the galaxy

• In a halo surrounding a galaxy's disk

• In the center of the galaxy

• In the outer regions of the universe

How do astronomers determine the age of a star cluster?

• By measuring the distance from Earth

• By analyzing the color of the stars

• By using an H-R diagram

• By counting the number of stars

What is the main sequence in the context of star clusters?

• A band where stars are very large and luminous

• A band running from the top left to the bottom right on an H-R diagram

• A group of stars that have already turned off

• A cluster of stars with tight concentrations

What indicates that the Beehive cluster is older than the Pleiades cluster?

• The Beehive cluster is located at the top left of the main sequence

• The Beehive cluster has more stars

• The Beehive cluster has stars that have moved to the right of the main sequence

• The Beehive cluster is brighter

What is the turnoff point on the main sequence?

• The point where stars are born

• The point where stars move away from the main sequence

• The point where stars become the most luminous

• The point where stars are the hottest

How can you determine the age of a star cluster using an H-R diagram?

• By looking at the color of the stars

• By measuring the distance between stars

• By observing the turnoff point on the main sequence

• By counting the number of stars

What distinguishes globular clusters from open clusters?

• Globular clusters are younger and contain fewer stars

• Globular clusters are older and more densely packed

• Globular clusters have a more open appearance

• Globular clusters are located in the spiral arms of galaxies

How does the color of stars in a cluster relate to their temperature?

• Red stars are hotter than blue stars

• Yellow stars are the hottest

• Color does not indicate temperature

• Blue stars are hotter than red stars