Front

What is the name of Earth's star?

Back

The Sun

Front

The Milky Way is located in the __________ of the spiral galaxy.

Back

Arms

Front

What color are the coolest stars?

Back

Red

Front

Astronomers think that in the future the universe will continue to __________.

Back

Expand

Front

Stars are made of _________ gas.

Back

Hydrogen

Front

What is the center of a galaxy called?

Back

The nucleus or core.

Front

What is a galaxy?

Back

A large system of stars, gas, and dust bound together by gravity.

Front

What is the closest star to Earth?

Back

Proxima Centauri.

Front

What is a supernova?

Back

A powerful explosion that occurs at the end of a star's life cycle.

Front

What is a black hole?

Back

A region in space where the gravitational pull is so strong that nothing, not even light, can escape.