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.

Front

How many stars are typically found in a galaxy?

Back

Millions or billions.

Front

What are the three main types of galaxies?

Back

Spiral, Elliptical, and Irregular.

Front

What type of galaxy is the Milky Way?

Back

Spiral.

Front

What is a galactic cluster?

Back

A galactic cluster is a group of galaxies that are held together by gravity.

Front

What is a spiral galaxy?

Back

A spiral galaxy is characterized by its spiral arms that extend from the center, containing stars, gas, and dust.

Front

What is an elliptical galaxy?

Back

An elliptical galaxy is a type of galaxy that has an ellipsoidal shape and lacks the distinct features of spiral galaxies.

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What is an irregular galaxy?

Back

An irregular galaxy does not have a distinct regular shape, often appearing chaotic in form.

Front

What is dark matter?

Back

Dark matter is a form of matter that does not emit light or energy, making it invisible and detectable only through its gravitational effects.

Front

What is the significance of the Hubble Space Telescope in studying galaxies?

Back

The Hubble Space Telescope has provided detailed images and data about galaxies, helping astronomers understand their structure and evolution.