books.google.co.uk - This volume deals with the tracts, Latin and vernacular, published in the Netherlands on the comets of 1577 and 1618. Central to the book is the question how these cometary appearances influenced the Aristotelian world view. Three introductory chapters on the historiography of cometology and the nature...http://books.google.co.uk/books/about/The_Ages_of_Two_faced_Janus.html?id=xO3n6sjUaK4C&utm_source=gb-gplus-shareThe Ages of Two-faced Janus
