STARS OF THE PLEIADES.[ToList]
Euripides speaks of these "seven paths," and Eratosthenes calls them "the seven-starred Pleiad," although he describes one as "All-Invisible." There is a surprisingly universal tradition that they "were seven who now are six." We find it not only in ancient Greece and Italy, but also among the black fellows of Australia, the Malays of Borneo, and the negroes of the Gold Coast. There must be some reason to account for this widespread tradition. Some of the stars are known to be slightly variable, and one of the fainter stars in the cluster may have shone more brightly in olden time;—the gaseous spectrum of Pleione renders it credible that this star may once have had great brilliancy. Alcyone, now the brightest star in the cluster, was not mentioned by Ptolemy among the four brightest Pleiads of his day. The six now visible to ordinary sight are Alcyone, Electra, Atlas, Maia, Merope and Taygeta. Celoeno is the next in brightness, and the present candidate for the seventh place. By good sight, several more may be made out: thus Maestlin, the tutor of Kepler, mapped eleven before the invention of the telescope, and in our own day Carrington and Denning have counted fourteen with the naked eye.
In clear mountain atmosphere more than seven would be seen by any keen-sighted observer. Usually six stars may be made out with the naked eye in both the Pleiades and the Hyades, or, if more than six, then several more; though with both groups the number of "seven" has always been associated.
In the New Testament we find the "Seven Stars" also mentioned. In the first chapter of the Revelation, the Apostle St. John says that he "saw seven golden candlesticks; and in the midst of the seven candlesticks one like unto the Son of Man, . . . and He had in His right hand seven stars." Later in the same chapter it is explained that "the seven stars are the angels of the seven churches; and the seven candlesticks which thou sawest are the seven churches." The seven stars in a single compact cluster thus stand for the Church in its many diversities and its essential unity.
This beautiful little constellation has become associated with a foolish fable. When it was first found that not only did the planets move round the sun in orbits, but that the sun itself also was travelling rapidly through space, a German astronomer, Mädler, hazarded the suggestion that the centre of the sun's motion lay in the Pleiades. It was soon evident that there was no sufficient ground for this suggestion, and that many clearly established facts were inconsistent with it. Nevertheless the idea caught hold of the popular mind, and it has acquired an amazing vogue. Non-astronomical writers have asserted that Alcyone, the brightest Pleiad, is the centre of the entire universe; some have even been sufficiently irreverent to declare that it is the seat of heaven, the throne of God. A popular London divine, having noticed a bright ring round Alcyone on a photograph of the group, took that halo, which every photographer would at once recognize as a mere photographic defect, as a confirmation of this baseless fancy. Foolishness of this kind has nothing to support it in science or religion; it is an offence against both. We have no reason to regard the Pleiades as the centre of the universe, or as containing the attracting mass which draws our sun forward in its vast mysterious orbit.
R. H. Allen, in his survey of the literature of the Pleiades, mentions that "Drach surmised that their midnight culmination in the time of Moses, ten days after the autumnal equinox, may have fixed the Day of Atonement on the 10th of Tishri."[221:1] This is worth quoting as a sample of the unhappy astronomical guesses of commentators. Drach overlooked that his suggestion necessitated the assumption that in the time of Moses astronomers had already learned, first, to determine the actual equinox; next, to observe the culmination of stars on the meridian rather than their risings and settings; and, third and more important, to determine midnight by some artificial measurement of time. None of these can have been primitive operations; we have no knowledge that any of the three were in use in the time of Moses; certainly they were not suitable for a people on the march, like the Israelites in the wilderness. Above all, Drach ignored in this suggestion the fact that the Jewish calendar was a lunar-solar one, and hence that the tenth day of the seventh month could not bear any fixed relation either to the autumnal equinox, or to the midnight culmination of the Pleiades; any more than our Easter Sunday is fixed to the spring equinox on March 22.
The Pleiades were often associated with the late autumn, as Aratus writes—
"Men mark them rising with Sol's setting light,
Forerunners of the winter's gloomy night."