Five famous Things Hipparchus Did or Ideas He Had
2. Hipparchus was the founder of trigonometry.
3.He is most famous for incidental Discovery Of precession of the equinoxes
4.Hipparchus assumed that the difference could be attributed entirely to the Moon’s observable Parallax against the stars, which amounts to supposing that the Sun, like the stars, is indefinitely far away
5.Hipparchus created a Star catalog that assigned names to each star along with his measurements of their positions.