4. JOHANNES KEPLER BELIEVED IN THE
HELIOCENTRIC
MODEL OF COPERNICO, BUT HE COULDNT REFUSE
TYCHO BRAHE´S THEORY AT ALL.
FIRSTLY HE THOUGHT THAT THE ORBITS WERE
PERFECT
CIRCUMFERENCESWHEN TYCHO BRAHE DIED, KEPLER GOT FROM HIM
ALL THE DATA THAT TYCHO HAD COLLECTED
WITH THE OBSERVATIONS TYCHO MADE OF MARS
KEPLER REALISED THAT THE ORBITS WERE NO
LONGER
PERFECT CIRCUMFERENCES, BUT ELIPTIC ORBITS
AS COPERNICO SAID, THE SUN IS THE CENTRE OF
THE SOLAR SISTEM
BEFORE NEWTON PROPOSED THE GRAVITY LAWS,
KEPPLER OBSERVED THAT THE GREATER AN ORBITS
WAS,
7. Main Ideas
The areas of all triangles are the same
size.
Area X and distance X is equal to
distance Y and area Y
The speed of the planet increases
when it nears the sun, and
decreases when i is furter away
