Word: parallaxes
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...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...
...discovered planet Eros is now the object of special investigation at the Harvard Observatory. At the present time the planet is nearer the earth than any other heavenly body with the exception of the moon, and is in opposition with the sun. Owing to its favorable position its solar parallax and brightness may be accurately determined...
Photographs of the shower will be taken by the Harvard Observatories at Cambridge and Blue Hill, and by Professor Upton of Brown University who is co-operating with Professor Pickering. The idea of these three photographic stations is to give a parallax so as to see how high the meteor is from the earth's surface when it appears and disappears...