Caspar Hersbach Celestial Globe with Comet below 1618 hand-colored engraving (broadside) British Museum from PORTENTS OF CIVIL WAR The sun reveals the secrets of the sky; And who dares give the source of light the lie? The change of empires often he declares, Fierce tumults, hidden treasons, open wars. He first the fate of Caesar did foretell, And pitied Rome, when Rome in Caesar fell; In iron clouds, conceal'd the public light; And impious mortals fear'd eternal night. Nor was the fact…