Astronomy, a handy manual for students and others (1918)
Dyson, Frank Watson, Sir, 1868-1939 · New York, E.P. Dutton & Co. · leaf 240
four phases of increasing and decreasing bright-ness are approximately equal. The variability of thestar has been known sinceis difficult to interpretowing to the juxtaposi-tion of bright and darklines and also on accountof its variability. Thechanges which the spec-trum undergoes have thesame… … Diag. XCI.Light changes of fi Lyrse. 23° ASTRONOMY magnitude and changes in the position of certain linesin the spectrum observed by Prof. Belopolsky and SirN. Lockyer, Prof. Myers of Indiana has deduced thatthe star consists of two large gaseous bodies very neartogether which revolve round one…
Astronomy
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