Spiral galaxies!

Front

What is a spiral galaxy?

Back

A spiral galaxy is a type of galaxy characterized by its spiral-shaped arms that wind outward from the center, containing stars, gas, and dust.

Front

Name an example of a spiral galaxy.

Back

The Milky Way is an example of a spiral galaxy.

Front

What are the main components of a spiral galaxy?

Back

The main components include a central bulge, spiral arms, and a halo of stars and globular clusters.

Front

How do spiral galaxies differ from elliptical galaxies?

Back

Spiral galaxies have a flat, rotating disk with spiral arms, while elliptical galaxies are more rounded and lack the distinct arms.

Front

What is the role of dark matter in spiral galaxies?

Back

Dark matter helps to explain the rotation curves of spiral galaxies, as it provides additional mass that affects their gravitational pull.

Front

What is the significance of the Hubble classification scheme?

Back

The Hubble classification scheme categorizes galaxies based on their shapes, including spiral, elliptical, and irregular types.

Front

What is the difference between barred spiral galaxies and regular spiral galaxies?

Back

Barred spiral galaxies have a central bar-shaped structure made of stars, while regular spiral galaxies do not.

Front

What is the typical lifespan of stars in spiral galaxies?

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Stars in spiral galaxies can have varying lifespans, with massive stars living only a few million years and smaller stars like red dwarfs living for billions of years.

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How do spiral galaxies form?

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Spiral galaxies are thought to form from the gravitational collapse of gas and dust, leading to star formation and the development of spiral arms.

Front

What is the role of supernovae in spiral galaxies?

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Supernovae contribute to the chemical enrichment of the interstellar medium and can trigger new star formation.