for proving that planets move in elliptical orbits
Explanation:
Many young men were excited when the war broke out since; they could join the army and do something for their country to make them proud or become 'heros'.
Large amounts of roman coins found in chang’an market are the artifacts that would be most useful for a historian trying to determine the volume of trade between europe and china along the silk roads. The physical characteristics of the roman coins and the distribution have already been acknowledge in very considerable detail and much attention has been paid for the relevance to economic history.
