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THE COPERNICAN MODEL: A SUN-CENTERED SYSTEM

by Michelle Marconi and Martina Capettini

In a book called On the Revolutions of the Heavenly Bodies

Copernicus proposed that the Sun was the center of the Solar System

THE HELIOCENTRIC SYSTEM

the Earth is just a planet and the Moon is in orbit around it

COPERNICUS AND THE NEED OF EPICYCLES

COPERNICUS AND THE NEED FOR EPICYCLES

The Copernican system required many fewer epicycles

RETROGRADE MOTION

RETROGRADE

MOTION

COULD BE EXPLAINED IN TERMS OF GEOMETRY

#1

#2

#3

VARYING BRIGHTNESS

THE VARYING BRIGHTNESS

of the planets

THE EARTH-CENTERED UNIVERSE

EARTH-CENTERED UNIVERSE

THE COPERNICAN REVOLUTION

3 INCORRECT IDEAS

1

THE EARTH IS THE CENTER OF THE UNIVERSE

He challenged this assumption

2

UNIFORM CIRCULAR MOTION IN THE HEAVENS

3

OBJECTS IN THE HEAVENS

THEY WERE MADE FROM A PERFECT SUBSTANCE

ARISTARCHUS OF SAMOS

c.310-c.230 BC

ARISTARCHUS OF SAMOS

THE PARALLAX EFFECT

THE PARALLAX

EFFECT

POLISH ASTRONOMER NICOLAUS COPERNICUS

1473-1543

NICOLAUS COPERNICUS

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