-
Cladius Ptolemy proposed the geocentric model of the Universe
-
Nicolaus Copernicus proposed the heliocentric model of the solar system.
-
Made the three laws of planetary motion
-
He improved the telescope and discovered that Saturn had rings.
-
Discovered Halley's Comet
-
Credited as the founder of sidereal astronomy
-
Predicted the position of Neptune with only maths
-
Discovered Pluto
-
Studied the outer Solar System
-
Studied Uranus and Neptune, as well as the outer Solar System
