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What is a Spiral Galaxy?

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A type of galaxy characterized by its spiral shape, with arms that wind outward from the center. Examples include the Milky Way and Andromeda.

Tags

NGSS.MS-ESS1-2

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What is an Elliptical Galaxy?

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A type of galaxy that has an ellipsoidal shape and lacks the distinct features of spiral galaxies. They are often older and contain less gas and dust.

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What is an Irregular Galaxy?

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A type of galaxy that does not have a distinct regular shape, often resulting from gravitational interactions or collisions with other galaxies.

Tags

NGSS.MS-ESS1-2

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What are the main components of a Spiral Galaxy?

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Spiral galaxies typically consist of a central bulge, spiral arms, and a halo of stars and dark matter.

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How do Spiral Galaxies form?

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Spiral galaxies form from the gravitational collapse of gas and dust, leading to the formation of stars and the characteristic spiral structure.

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What is the difference between a Spiral Galaxy and an Elliptical Galaxy?

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

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What is the significance of the Hubble classification?

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The Hubble classification system categorizes galaxies based on their shapes, helping astronomers understand their formation and evolution.

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What is a barred spiral galaxy?

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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.

Tags

NGSS.MS-ESS1-2

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What role do supermassive black holes play in galaxies?

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Supermassive black holes are found at the centers of most galaxies and influence their formation, evolution, and dynamics.

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What is the Local Group?

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The Local Group is a collection of over 54 galaxies, including the Milky Way, Andromeda, and several smaller galaxies.