First published in 1928, this introduction to 'the study of the heavens' includes chapters on: 'The Celestial Sphere and its Motions';'The Sun and its Systems'; and 'The Universe of the Stars'. It also features an appendix of interesting astronomical...

Galileo's telescopic discoveries, and especially his observation of sunspots, caused great debate in an age when the heavens were thought to be perfect and unchanging. Christoph Scheiner, a Jesuit mathematician, argued that sunspots were planets or m...