IN STARRY REALMS 



BY 



SIR ROBP:RT s. BALL, D.SC., LL.D., F.R.S. 



LOWNDEAN PROFESSOR OF ASTRONOMY AND GEOMETRY IN THE 

 UNIVERSITY OF CAMBRIDGE 



AUTHOR OF "GREAT ASTRONOMERS," " IN THE HIGH HEAVENS," ETC. 



WITH NUMEROUS ILLUSTRATIONS 



CHEAP EDITION 



LONDON: SIR ISAAC PITMAN & SONS, LTD 

 BATH AND NEW YORK 



