Early Astronomers

What is in the center of the Heliocentric Model?

• Sun
• Comet 
• Jupiter
• Earth

  What does "geo-" mean?

• Earth
• sun
• Center

This person believed that planets move on small circles that move on larger circles

• Ptolemy
• Copernicus
• Galileo
• Aristotle

This person discovered moons on Jupiter, which helped to support the heliocentric theory 

• Aristotle
• Copernicus
• Ptolemy
• Galileo

This person developed the heliocentric theory and was considered the founder of modern astronomy.

• Aristotle
• Copernicus
• Ptolemy
• Galileo

This person was the first to use a telescope to make observations in the sky -

• Aristotle
• Ptolemy
• Copernicus
• Galileo

Which astronomer created laws of gravity and motion? 

• Kepler
• Copernicus
• Brahe 
• Newton

What two forces help planets stay in their orbits? 

• Gravity and Force
• Gravity and Inertia
• Doppler effect and Gravity
• Inertia and Force 

This astronomer discovered that the orbit of each planet is an ellipse, or an oval shape, and not perfectly circular.

• Aristotole
• Copernicus
• Kepler
• Newton

What theory of the Universe did Aristotle believe in? 

• Heliocentric theory
• Alphamanic theory
• Geocentric theory
• Vergocentric theory