What is the closest planet to the Sun?

Which planet is known as the Red Planet?

What is the name of our galaxy?

Which planet has the most moons?

What do we call a large group of stars, dust, and gas held together by gravity?

What is the name of the first man-made satellite to orbit Earth?

What are Saturn’s rings made of?

What is a light-year a measure of?

Who was the first human to travel into space?

What causes a solar eclipse?

What is the name of NASA’s most famous space telescope?

How long does it take the Earth to complete one rotation?

What is the Sun mostly made of?

What is the name of the first rover to successfully land on Mars?

What’s the term for a rocky object entering Earth's atmosphere and burning up?