8-3 The Solar System

A __________ is any object that moves in orbit around another body.

• Star

• Comet

• Satellite

• Asteroid

The Sun and all the objects that orbit around it make up the __________. (2 words)

• Solar System

• Milky Way

• Galaxy Cluster

• Universe

What is a planet?

Which of the following lists the 8 planets in order from the closest to the farthest from the Sun?

• Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

• Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Mercury

• Earth, Mars, Venus, Mercury, Jupiter, Saturn, Uranus, Neptune

• Mars, Earth, Venus, Mercury, Jupiter, Saturn, Uranus, Neptune

The orbits of the planets are perfect circles. (True or False)

• True

• False

Name three men who studied the planets.

• Galileo

• Newton

• Copernicus

• Armstrong

• Hubble

__________ is the force of attraction between all objects.

__________ invented the first telescope.

• Isaac Newton

• Albert Einstein

• Galileo Galilei

• Nikola Tesla

What does the acronym NASA stand for?

• National Aeronautics and Space Administration

• National Astronomy and Science Association

• National Aerospace and Space Agency

• National Aeronautics and Science Administration

People who go into space to explore are called __________.

• Astronomers

• Pilots

• Astronauts

• Scientists