Galaxies

Front

What is a galaxy?

Back

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 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 a Spiral Galaxy?

Back

A Spiral Galaxy is a type of galaxy characterized by its spiral arms that wind outward from the center, containing young 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 is shaped like a sphere or an elongated football, composed mainly of older stars and little gas or dust.

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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 regular or definite shape, often containing young stars and significant amounts of gas and dust.

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What type of galaxy is the Milky Way?

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The Milky Way is a Spiral Galaxy.

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What is the main characteristic of Elliptical Galaxies?

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Elliptical Galaxies are primarily composed of older stars and have little to no new star formation.

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What is the difference between Spiral and Elliptical Galaxies?

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Spiral Galaxies have distinct spiral arms and are rich in gas and dust, while Elliptical Galaxies are more rounded and contain older stars with little gas.

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What is a Lenticular Galaxy?

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A Lenticular Galaxy is a type of galaxy that has a central bulge and a disk but lacks the spiral arms of a Spiral Galaxy.

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What is dark matter in the context of galaxies?

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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 in galaxies.