Astronomy Review

Began a new era of astronomy when he concluded that the Sun was the center of the universe

• Aristotle
• Isaac Newton
• Claudius Ptolemy
• Nicolaus Copernicus

What is in the center of the Heliocentric Model?

• Sun
• Comet 
• Jupiter
• Earth

What model does this represent?

• Geocentric 
• Heliocentric 

  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

Ancient astronomers used 'epicycles' to explain,

• Planetary transits
• Moon's phases
• Retrograde motion

Retrograde describes a planet that looks like it is going ___.

• backwards

• forwards

The heliocentric model has the solar system orbiting the ___.

• sun

• earth