The Life of Tycho Brahe

Indeed, from the Holy Scriptures, the matter would be considered clearly resolved if it could be deduced from them, even by some slight trace, what Josephus says: that the descendants of Seth discovered the science of the stars before the flood and inscribed it upon two columns, one of brick and the other of stone, so that it might at least be preserved on the stone, which would survive the injury of the coming flood; or if there existed even a slight indication of that reasoning which the same author provides for their long lives—that there was, namely, enough time for completing Astronomy, which requires at least six hundred years so that all the varieties of celestial motions may be observed. Therefore, he notes that the Great Year, as they call it, consists of six hundred common years, because it is a common opinion that celestial motion is always varied:

Until, when the year which is called "great" is consumed,
The wandering stars return again to their ancient course,
Such as they had stood from the beginning of the past world.

The matter might also seem to be nearly resolved from the time of the Flood, if there were even the smallest word from which it could be argued that which is written by the same author: that the Egyptians had been taught Astronomy by Abraham. But, of course, both Berosus and the others cited by Josephus as well as Eusebius could have [learned] some such thing...