Ptolemy
Solar System
Date of Discovory
He discovered it in the Second Century AD.
What was the Discovory
Ptolemy thought that Earth was the centre of the solar system. Although he was wrong he then realised that there were other planets and moons. He also listed 48 constellations.
Ptolemy
Orion
The Orion is a constellation that Ptolemy discovered.
Libra
The libra was another constellation that Ptolemy discovered and named.
Ptolemys Contribution to Our Understanding
It shows that there are other planets and other interesting things out there.