It was in the second century BC Hipparchus used lunar parallax to calculate a value for the minimum and maximum distance of the earth and moon. His results are very close to the modern calculation of this distance.
Following link would be helpful to see his complete work... https://link.springer.com/article/10.1007%2FBF00329826
Which English computer scientist and MIT professor implemented the first successful communication between an HTTP client and server via the Internet on 25 December 1990 and is credited with inventing the World Wide Web?
