Galaxies

Front

What is a galaxy?

Back

A galaxy is a massive system that consists of stars, star clusters, dust, gas, and dark matter, all bound together by gravity.

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How many galaxies are there in the universe?

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There are estimated to be over 2 trillion galaxies in the observable universe.

Front

What is the Milky Way Galaxy?

Back

The Milky Way Galaxy is the galaxy that contains our solar system and is classified as a spiral galaxy.

Front

What are the main types of galaxies?

Back

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

Front

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.

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What is an elliptical galaxy?

Back

An elliptical galaxy is a type of galaxy that has an oval shape and is composed mainly of 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 defined shape or structure.

Front

What is the difference between a spiral and an elliptical galaxy?

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Spiral galaxies have distinct spiral arms and younger stars, while elliptical galaxies are more rounded and contain older 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.

Front

What role do galaxies play in the universe?

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Galaxies are the building blocks of the universe, containing stars, planets, and other celestial bodies, and they help in the formation of new stars.