Space Systems

Front

What is the only star in our solar system?

Back

The Sun.

Front

What unit do scientists use to measure distances in space?

Back

Light year.

Front

What is the phase of the moon when half of it is illuminated?

Back

Quarter moon.

Front

What force keeps the moon in orbit around the Earth?

Back

Gravity.

Front

What celestial object is at the center of our solar system?

Back

The Sun.

Front

What is the term for the path that a planet takes around the Sun?

Back

Orbit.

Front

What is the name of the galaxy that contains our solar system?

Back

The Milky Way.

Front

What is the term for a large group of stars, gas, and dust held together by gravity?

Back

Galaxy.

Front

What do we call the time it takes for the Earth to complete one rotation on its axis?

Back

A day.

Front

What is the term for the time it takes for the Earth to orbit the Sun?

Back

A year.