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 force holds a galaxy together?

Back

Gravity.

Front

What are the three main types of galaxies?

Back

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.

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.

Front

What is an irregular galaxy?

Back

An irregular galaxy is a type of galaxy that does not have a defined shape or structure.

Front

What characteristic is used to classify galaxies?

Back

Shape.

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 Milky Way?

Back

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