What is a Galaxy?

Which is NOT included in a galaxy?

• gas

• dust

• stars

• heat

What do scientist believe is at the center of most galaxies?

• the moon

• a black hole

• the sun

The largest galaxies can have more than how many stars?

• one hundred thousand

• one hundred trillion

• one million

• one billion

Earth is located in the Milky Way galaxy?

• True

• False

What type of galaxy is Earth in?

• spiral

• elliptical

• irregular

Irregular galaxies have no:

• shape

• size

What group is our galaxy in?

• Local

• Noncluster

• Cluster

A large grouping of clusters is called a/an:

• super cluster

• Local Group

Clusters can contain how many galaxies?

• 1

• 50

• 100

• 1000's

What is the name of our galaxy?

• Milky Way

• Andromeda