Multiple Choice Questions on Planetary Systems

A planetary system is essentially made up of one of these celestial bodies and all the objects that orbit it. What is this central body?

• Planet

• Moon

• Comet

• Star

Besides planets and a central star, a planetary system can also include billions of smaller objects, such as:

• Galaxies, black holes, and nebulae.

• Comets, asteroids, meteoroids, and tiny bits of ice and rock.

• Stars, galaxies, and quasars.

• Dark matter and dark energy.

The objects in a planetary system are held together by:

• Centrifugal force

• Kinetic energy

• Gravity

• Magnetic fields

What is the name given to the celestial body that orbits a planet?

• Comet

• Moon

• Star

• Asteroid

What is the Earth's natural satellite called?

• Sun

• Venus

• Moon

• Mars

The Earth has how many natural satellites orbiting it?

• Zero

• One

• Two

• Three

What is our planetary system called?

• The Milky Way

• The Andromeda Galaxy

• The Asteroid Belt

• The Solar System

According to the text, how many planets are there in our planetary system?

• Seven

• Eight

Which planet is the central star of our Solar System?

• Earth

• Jupiter

• Moon

• Sun

Which two planets in our Solar System do not have moons (natural satellites)?

• Earth and Mars

• Jupiter and Saturn

• Uranus and Neptune

• Mercury and Venus