8.9B Types of Galaxies (12/3 Warm Up)

Front

What is a spiral galaxy?

Back

A spiral galaxy is a type of galaxy characterized by its spiral shape, with arms that wind outward from the center. They often contain young stars, gas, and dust.

Front

What is an elliptical galaxy?

Back

An elliptical galaxy is a type of galaxy that has an oval shape and lacks the distinct arms of spiral galaxies. They are generally older and contain older stars.

Front

What is a barred spiral galaxy?

Back

A barred spiral galaxy is a type of spiral galaxy that has a central bar-shaped structure made of stars, with spiral arms extending from the ends of the bar.

Front

What is an irregular galaxy?

Back

An irregular galaxy is a type of galaxy that does not have a defined shape or structure. They often contain a mix of young and old stars.

Front

Name the four main types of galaxies.

Back

The four main types of galaxies are spiral, elliptical, barred spiral, and irregular.

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What type of galaxy is the Milky Way?

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The Milky Way is a barred spiral galaxy.

Front

What distinguishes a spiral galaxy from an elliptical galaxy?

Back

Spiral galaxies have distinct spiral arms and contain younger stars, while elliptical galaxies are more rounded and contain older stars.

Front

What is the significance of the central bulge in a spiral galaxy?

Back

The central bulge in a spiral galaxy contains older stars and is often surrounded by a disk of younger stars and gas.

Front

How do stars form in spiral galaxies?

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Stars in spiral galaxies form from the gas and dust in the spiral arms, where conditions are favorable for star formation.

Front

What role does dark matter play in galaxies?

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Dark matter is thought to make up a significant portion of the mass in galaxies, influencing their structure and rotation.