ES 30.3/30.4 Review Stars

What type of galaxy contains only a few young stars, has little dust and gas, and is elongated?

• elliptical galaxy

• spiral galaxy

• barred spiral galaxy

• irregular galaxy

What type of galaxy is a group of stars that contains a center, or nucleus, of bright stars from which two or more flattened arms radiate outward?

• elliptical galaxy

• spiral galaxy

• barred spiral galaxy

• irregular galaxy

What type of galaxy is like a spiral galaxy with a bar running through the center?

• elliptical galaxy

• spiral galaxy

• barred spiral galaxy

• irregular galaxy

Which is the largest grouping of stars?

• cluster

• galaxy

• constellation

What galaxy is the Earth in?

• Large Magellanic Cloud

• Small Magellanic Cloud

• Milky Way

• Andromeda

Our unaided eyes can typically only see stars that are less than

• 1 million light years away.

• 1,000 light years away.

• 100 light years away.

This has a loose shape, over a hundred stars, and is generally found near the arms of a spiral galaxy.

• Open cluster

• Globular cluster

• Irregular cluster

This has a group of stars with a spherical shape containing up to 100,000 stars, and usually found in the center of a spiral galaxy.

• Open cluster

• Globular cluster

• Irregular cluster

What type of galaxy is a group of stars that has no particular shape and tends to be low in mass and rich in dust and gas?

• elliptical galaxy

• spiral galaxy

• barred spiral galaxy

• irregular galaxy

How many galaxies do astronomers estimate there are in our Universe?

• 88

• 100 million

• 100 billion