What do astronomers study?

• Stars, planets, galaxies, and everything else in the universe

• Only stars

• Only planets

• Only galaxies

Which constellation is part of the larger constellation Ursa Major?

• The Big Dipper

• Orion

• Betelgeuse

• Rigel

What force keeps the planets in orbit around the sun?

• Gravity

• Magnetism

• Electricity

• Friction

How long does it take for Earth to complete its orbit around the sun?

• 365.25 days

• 24 hours

• 30 days

• 12 months

The tilt of Earth's axis causes the changing ___ on Earth.

Telescopes are essential instruments for gathering ___ from distant objects.

The sun's gravity maintains the ___ and stability of our planetary system.