MEANS THE EARTH IS THE CENTER

​GEOCENTRIC

MEANS THE EARTH

​PREFIX "GEO"

GEOCENTIC

​GEOCENTRIC MODEL

DURING THE 1500s

ROMANS AND GREEKS BELIEVED

1. THE EARTH WAS THE CENTER OF THE SOLAR SYSTEM

2. THE SUN, PLANETS, AND MOON ALL REVOLVED AROUND THE EARTH

NO TECHNOLOGY

​WITHOUT TELESCOPES, ROMANS AND GREEKS COULD ONLY SEE...

1. THE SUN 6. JUPITER

2. MOON 7. SATURN

3. MERCURY

4. VENUS

5. MARS

HELIOCENTRIC

MEANS THE SUN IS IN THE CENTER

​HELIOCENTRIC

MEANS THE SUN

​PREFIX "HELIO"

​HELIOCENTRIC MODEL

HELIOCENTRIC THEORY

MEANS THAT THE SUN IS THE CENTER OF THE SOLAR SYSTEM, AND THAT THE PLAENTS, MOONS, ASTEROIDS ALL ORBIT/REVOLVE (GO AROUND) THE SUN

SINCE THE SUN IS THE CENTER

​THE SUN'S GRAVITY

1. KEEPS ALL THE PLANETS IN ORBIT (AROUND THE SUN) IN AN ELLIPTICAL PATH

2. STOPS THEM FROM FLOATING AWAY IN SPACE

1. USED TELESCOPES TO PROVE THE HELIOCENTRIC MODEL

2. WAS PUT IN JAIL BECAUSE HE DISAGREED WITH THE CHURCH

​

​GALILEO (1564-1642)

ADVANCES IN TECHNOLOGY

1. SATELLITES, BETTER TELESCOPES, SPACE TRAVEL

2. HAVE ALLOWED US TO MAKE CHANGES TO PREVIOUS BELIEFS AND WAYS OF THINKING