Galaxies

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What is an irregular galaxy?

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An irregular galaxy is a type of galaxy that does not have a distinct regular shape or structure, often appearing chaotic in form.

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What are the three main types of galaxies?

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

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What is the Milky Way Galaxy?

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The Milky Way Galaxy is the galaxy that contains our Solar System, characterized as a barred spiral galaxy.

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What is the closest large spiral galaxy to the Milky Way?

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The Andromeda Galaxy is the closest large spiral galaxy to the Milky Way.

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How many stars are estimated to be in the Milky Way Galaxy?

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The Milky Way Galaxy is estimated to contain about 200 billion stars.

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What is a spiral galaxy?

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

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What is an elliptical galaxy?

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An elliptical galaxy is a type of galaxy that has an ellipsoidal shape and lacks the distinct features of spiral galaxies, often containing older stars.

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What is the significance of the Andromeda Galaxy?

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The Andromeda Galaxy is significant as it is the nearest spiral galaxy to the Milky Way and is on a collision course with it.

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What is the role of dark matter in galaxies?

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Dark matter is a form of matter that does not emit light or energy, and it is believed to make up a significant portion of the mass in galaxies, influencing their structure and behavior.

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What is a galaxy cluster?

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A galaxy cluster is a large group of galaxies held together by gravity, often containing hundreds to thousands of galaxies.