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 contains only old stars?

Back

Elliptical galaxy.

Front

What is an irregular galaxy?

Back

A random scattered type of galaxy that does not form a distinct shape or pattern.

Front

What is a spiral galaxy?

Back

A type of galaxy characterized by its spiral arms and a central bulge, containing both old and new stars.

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 galaxy and a solar system?

Back

A galaxy is a large system of stars, gas, and dust, while a solar system consists of a star and the celestial bodies that orbit it.

Front

What is the role of gravity in galaxies?

Back

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

Front

What is a nebula?

Back

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

Front

What is the significance of dark matter in galaxies?

Back

Dark matter is believed to make up a significant portion of the mass in galaxies, affecting their formation and rotation.