HIS MODEL PLACED THE MOON,SUN,PLANETS, AND STARS AROUND EARTH.

HIS MODEL ATTEMPT TO MEASURED THE DISTANCE FROM MOON TO THE SUN.

HIS OBSERVATIONS OF THE PLANETS GOING BACK AS 800 YEARS.

HE FELT THE PTOLEMYS MODEL OF THE SOLAR SYSTEM WAS TOO COMPLICATED

HE WAS A GERMAN MATHEMATICIAN AND ASTRONOMER.

WAS A SCIENTIST WHO APPROACHED QUESTIONS OF THE SCIENTIFIC METHOD

Dutch discovered Saturn's first satellite, Titan, and the true shape of Saturn's rings

GERMAN DISCOVERED THE FIRST COMET, NOW CALLED ENCKE'S COMET