6500 B.C.
Farming begins in Asia..

4500 B.C.
Copper Smelting and casting in Mesopotamia.

4000 B.C.
Pottery Kilns, and the invention of the wheel in Mesopotamia.

3500 B.C.
Invention of writing in Mesopotamia.

2500 B.C.
Pyramids in Egypt, Chinese wheel appears

2000 B.C.
Ziggarats appear in Babylon

1792 B.C.
Hammurabi rules Babylon . From 1792 until 1750 B.C. rules and expands laws, and architecture

1400 B.C.
Chinese eclipse records begin

500 B.C.
Selucid Empire -- Babylonian astronomy reaches high point

265 B.C.
The hemispherical dome cosmology is developed, which predicts a nearly round earth, surrounded by a trough of water.

120 B.C.
Loshia Hung develops celestial sphere cosmology, which provides complete explaination of star motions, and sets framework for mapping planetary motions.

100 B.C.
Round earth theory and infinite empty space cosmology proposed. Chinese astronomers estimate the size of the round moon and earth.

28 B.C.
Chinese record sunspots for the first time

200 A.D.
Unification of China

250 A.D.
Water powered astronomical globes developed in China

700 A.D.
Beginning of Muslim Conquests

820 A.D.
Muslim astronomy in Baghdad flowers

940 A.D.
Oldest Chinese star map -- The Tunhuang manuscript star-map showing contellations.

1090 A.D.
Su-sung's armillary sphere developed.

1193 A.D.
The Suchow planisphere developed by the astronomer Huang Shang.

1247 A.D.
The Suchow planisphere committed to stone.

1350 A.D.
Chinese invent equatorial mounting for astronomical instruments.