He was the first to suggest that the movement of the planets, sun, moon, and stars could be equated in numbers.
Pythagoras is another Greek philosopher who is better known for mathematics but also has contributions in Astronomy. He postulated that the earth is spherical in shape as other celestial bodies are. He came up with this idea when he saw ships disappear past the horizon as they sail. He was the first to suggest that the movement of the planets, sun, moon, and stars could be equated in numbers.