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Updated: April 30, 2025
She circuits the star-sphere in about twenty-seven days and a third, while the lunation or interval from new moon to new moon is, as we all know, about twenty-nine days and a half in length. How they managed about the fractions of days outstanding whether the common lunation was considered or the moon's motion round the star-sphere is not known.
Between 2100 and 2200 years before the Christian era the southern constellations had the position described, the invisible southern pole lying at the centre of the vacant space of the star-sphere or rather of the space free from constellations.
Near this spot, then, we may be sure, lay the southern pole of the star-sphere when the old constellations, or at least the southern ones, were invented. Now it is a matter of no difficulty whatever to determine the epoch when the southern pole of the heavens was thus placed.
The Great Pyramid, as we know, is about 30 degrees north of the equator; but we also know that its architects travelled southwards to find a suitable place for it. One of their objects may well have been to obtain a fuller view of the star-sphere south of their constellations.
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