Galaxies

Front

What type of galaxy is the Milky Way?

Back

Spiral

Front

How many galaxies have we discovered?

Back

Billions

Front

What is responsible for holding the stars, gas, and dust together in a galaxy?

Back

Gravity

Front

A light year is the measurement of ________ light travels in one year.

Back

Distance

Front

How many stars make up our galaxy?

Back

200 billion

Front

What are the three main types of galaxies?

Back

Spiral, Elliptical, Irregular

Front

What is the center of a spiral galaxy typically composed of?

Back

A supermassive black hole

Front

What is the difference between a galaxy and a star cluster?

Back

A galaxy is a large collection of stars, gas, and dust, while a star cluster is a smaller group of stars bound by gravity.

Front

What is the observable universe?

Back

The part of the universe that we can see, which contains billions of galaxies.

Front

What is dark matter?

Back

A form of matter that does not emit light or energy, making it invisible, but it exerts gravitational effects.