Hellenistic Culture
Astronomy
Physics
Philosophy
Mathematics
Define Hellenistic and how Alexandria became a center of Hellenistic culture
Alexandria's museum had a small observatory
Aristarchus
Earth and other planets revolve around the Sun.
Estimated that the Sun was 300x the size of the Earth.
Euclid
Book Elements: 465 geometry proofs. 
Archimedes
Estimated π (pi)
Archimedes
Invented many things
Force pump
Pneumatic machines
Compound Pulley
Archimedes' Screw
Steam engine
Stoicism
Epicureanism
Founded by Zeno
People should live in harmony with the will of god or the natural laws of god
Founded by Epicurus
The only real objects were the ones that you could sense with your 5 senses.
Greatest good was virtuous conduct
Hellenistic is the combination of Greek culture with certain adaptations with Egyptian, Persian, and Indian. The idea was to create a culture that could unify people, which it largely did.
Alexandria became the center of Hellenistic culture due to many people admiring its beauty. This led to many rich people and rulers moving there, and as a result other people followed. This allowed for the building of many important buildings, such as observatories, and the Alexandria library.
Basis for Geometry today