Ptolemy:
Ptolemy was an astronomer, mathematician, and geographer from 168 A.D. He created the first useful tool to compute the positions of the sun, moon, planets, the rising and setting of stars, and the eclipses of the sun and the moon. Also his Planetary Hypothesis established a realization of the universe as a set of nested spheres.
Ptolemy was an astronomer, mathematician, and geographer from 168 A.D. He created the first useful tool to compute the positions of the sun, moon, planets, the rising and setting of stars, and the eclipses of the sun and the moon. Also his Planetary Hypothesis established a realization of the universe as a set of nested spheres.
Johannes Kepler: Kepler was a mathematician as well as an astronomer, and a geographer. He was one of the most influential men of the scientific revolution. His discoveries proved that earth was not in fact the center of the universe but in fact it was the sun.
Galileo Galilei: Developed on Kepler's work and created the first magnified telescope. Also, he discovered Jupiter's latest four moons, Europa, Ganymede, IO, and Callisto. He also discovered Saturn's rings, the fact that venus has phases, like our own moon, and lunar craters. Galileo was convinced that the earth revolved around the sun, and ultimately was arrested by the catholic church because of this.