Galaxies

Front

What is a galaxy?

Back

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

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What are the main types of galaxies?

Back

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

Front

What characterizes a Spiral Galaxy?

Back

A Spiral Galaxy has a flat, rotating disk containing stars, gas, and dust, along with a central concentration of stars known as the bulge.

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What is an Elliptical Galaxy?

Back

An Elliptical Galaxy is generally older, has an ellipsoidal shape, and contains very little gas and dust, meaning it is not actively forming new stars.

Front

What defines an Irregular Galaxy?

Back

An Irregular Galaxy does not have a distinct regular shape and often results from the gravitational interactions of other galaxies.

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What are the components of a galaxy?

Back

Galaxies are composed of stars, dust, and gas held together by gravity.

Front

What is dark matter?

Back

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

How do galaxies form?

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Galaxies form from the gravitational collapse of gas and dust in the early universe, leading to the creation of stars and other structures.

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What is the Milky Way?

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

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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 or thousands of galaxies.