Galaxies

Front

What is a galaxy?

Back

A huge system of millions or billions of stars, together with gas and dust, held together by gravity.

Front

What type of galaxy is characterized by a spiral shape?

Back

Spiral galaxy.

Front

Which type of galaxy contains a lot of dust and gas?

Back

Irregular galaxy.

Front

What is an elliptical galaxy?

Back

A type of galaxy that has an elongated shape and contains older stars with little gas and dust.

Front

What type of galaxy contains a mixture of all ages of stars?

Back

Spiral galaxy.

Front

What are the three main types of galaxies?

Back

Spiral, elliptical, and irregular.

Front

What is the Milky Way?

Back

The spiral galaxy that contains our solar system.

Front

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

Back

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

Front

What is a nebula?

Back

A giant cloud of gas and dust in space, often the birthplace of stars.

Front

What is the role of gravity in galaxies?

Back

Gravity holds the stars, gas, and dust together in a galaxy.