title: As international as they would let us be
abstract: Abstract Astronomers wanting to chart the whole sky, or even part of it, 24/7, must collaborate across nations, continents, and hemispheres. The Greeks were perhaps the first to do this, though Eratosthenes' measurement of the diameter of the earth was done when Alexandria and Syene were both part of Ptolemaic Egypt. The Golden Age of Arabic/Moslem astronomy coincided with times when there were very large caliphates and similar empire-like structures. The situation was very different for Europea
journal: Proceedings of the International Astronomical Union