Historical Models of the Solar System

Aristotle's model was...

This astronomer figured out that Venus went through phases just like the moon.

Kepler also figured out that the farther a planet is from the sun the ______ slower it moved.

This astronomer observed Jupiter's moons.

Copernicus believed that...

This astronomer introduced the "wheels-on-wheels" model.

This is when a planet moves in a smaller circle, while also rotating on the bigger orbit.

Kepler figured out that a closer a planet is to the sun the _______ it moves.

Who invented the telescope?

This astronomer believed orbits were ellipses (oval) not circles!

What does Heliocentric mean?

What is parallax?

What does Geocentric mean?

Ptolemy's model was...

Aristarchus thought that the Solar System was heliocentric (sun), but people didn't agree.

True or False: In Kepler's model, the sun is in the middle of the orbit.

Copernicus' model was...