In 1975 a nova appeared in the constellation of cygnus. In two days the magnitude of the star changed from `=+15` to `+2`. By what factor did its brig

In 1975 a nova appeared in the constellation of cygnus. In two days the magnitude of the star changed from `=+15` to `+2`. By what factor did its brig
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In 1975 a nova appeared in the constellation of cygnus. In two days the magnitude of the star ... +2`. By what factor did its brightness increase?
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