Word: fainter
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Dates: during 1900-1909
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...probably the last for thirty-three years, although it is possible that next year a small shower may be visible. The color of the Leonids was a faint green. Three dozen photographs were taken during the night, but they were not very successful, as the Leonids were much fainter and of shorter duration than on the preceding evening. In all about seven dozen photographs were made and although they have not as yet been carefully examined their development shows them to have been fairly successful. The Observatory succeeded in getting several photographs of the Leonids' trails...
Preparations are being made at the Observatory for photographing the nebula of the Nova Persei. Ever since the star was discovered last February it has been growing fainter, and it is feared that if photographs are not obtained soon no further chance will be offered. Every night telescopic photographs will be taken and the time of exposure will be lengthened, as it is thought that under-exposure may account for recent failures to obtain photographs of the nebula. It is intended also to determine by the parallax method the distance and motion of the star...
...known as Argelander's method, is essentially as follows. A series of stars of constant brightness is selected, as near as possible to the variable to be observed, in such a way that the brightest is somewhat brighter than the variable at its maximum intensity, and the faintest somewhat fainter than the variable at minimum. Between these extremes the stars differ one from another in brilliance by about half a magnitude, and they are designated by letters in the order of brilliance. This sequence of stars of known magnitude enables the brightness of the variable star to be closely determined...