Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 382
gust 9,and on August 20. On the earher photograph, going down to9-5 m., the star does not appear. On the later, taken the nightbefore its discovery, it was of magnitude 4-8 m. It wasphotographed in Sweden on August 16, and was then of DOUBLE AND VARIABLE STARS 333 magnitude 7-0 m. On August 22, it… … FiG. 96.—The Light Curve of Nova Cygni (1920). ably greater. The decrease in brightness was much morerapid. By the end of August, the magnitude had fallen to 4 m.and oscillations had started, and by the end of October it wasfainter than 9 m. The light curve is shown in Fig. 96. Whether the final…
Astronomy
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