I found this interesting article which I think many here may find fascinating as I did.

Endeavour Volume 24, Issue 4 , 1 December 2000, Pages 157-164

Diffusion of astronomy in the ancient world

By Nataraja Sarma

Is a graduate of the Universities of Madras, Cambridge, and London and now does research in high energy physics at the Bhabha Atomic Research Centre, Bombay, India

Available online 21 March 2001.

ABSTRACT

Astronomical techniques, calendars and devices were developed independently in many places around the world. However, there was much cross-cultural exchange of technology over the centuries. The cultures of Egypt, Greece, India and China influenced each others’ astronomy and each cannot be treated in isolation.