Astronomers

  What does "geo-" mean?

• Earth
• sun
• Center

This image shows the:

• Geocentric Solar System
• Heliocentric Solar System

A model of the solar system in which Earth and the other planets revolve around the SUN.

• Heliocentric
• Geocentric

What does "helios" mean?

• Earth
• center of
• sun
• moon

The sun centered view of the universe

• Galaxy
• Geocentric
• Astonomy
• Heliocentric

Copernicus' view of the universe

• Galaxy
• Geocentric
• Astonomy
• Heliocentric

Ptolemy's view of the universe

• Galaxy
• Geocentric
• Astonomy
• Heliocentric

What is the heliocentric theory?

• There is no sun
• The sun is smaller than the Earth
• The sun is the center of the universe
• The Earth in the center of the universe

What did Galileo Improve?

• The astrolabe
• the stars
• The Telescope
• cat food.

What force keeps the planets orbiting the sun?

• Gravity
• Magnetism
• Electricity
• Friction