Galaxies

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What is a galaxy?

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A galaxy is a massive system that consists of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity.

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What are the main types of galaxies?

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The main types of galaxies are Spiral, Elliptical, and Irregular.

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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 an Irregular Galaxy?

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An Irregular Galaxy is a type of galaxy that does not have a distinct regular shape, often resulting from gravitational interactions.

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What is the most abundant type of galaxy in the universe?

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The most abundant type of galaxy in the universe is the Elliptical Galaxy.

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What are the main components found in galaxies?

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Galaxies contain dust, gas, and stars.

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How many stars can be found in a galaxy?

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A galaxy can contain millions or billions of stars.

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What is dark matter?

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Dark matter is a form of matter that does not emit light or energy, making it invisible, but it exerts gravitational effects on visible matter.

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What role does gravity play in galaxies?

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Gravity is the force that holds galaxies together, keeping stars and other components bound within the galaxy.