rrobs
Well-Known Member
I was with you until the last paragraph. How can you summarily call an entire civilization less than reasonably intelligent? I dare say you would have thought exactly like them had you lived at that time. Otherwise, pretty good points.Probably one close to that of Eudoxus, which was a precursor to that of Ptolemy. And, of course, Ptolemy's system was based solely on observations with eyes only.
It isn't too difficult with eyes only to figure out that the Earth isn't flat. That can be seen when there is a lunar eclipse and those happen often enough to give at least that much information. What we now know as the rotation of the Earth shows up as the motion of the sun and stars across the sky to reappear the next day or night.
Again, it is easy enough to see that the moon's phase has to do with the angle from the sun and that both the sun and the moon move with respect to the stars, which stay in the same relative positions in the sky. The cyclical nature of both the movement of the moon and that of the sun have been very apparent since ancient times and probably before there was writing.
That *does* suggest a background dome on which the stars are placed with the sun, moon, and planets moving in front of that dome. How to deal with the specific motion of the planets against that background would be the main sticking point (which, by the way, it was for Ptolemy).
To get to a heliocentric model as opposed to a geocentric model is very tricky without a telescope to give some extra information. One big clue is the brightness of Venus, but the phases of Venus aren't visible without a telescope, so that doesn't go a long way. Another is the retrograde motion of the planets in the sky, but with the accuracy possible with only naked eye observation, there are other systems that work reasonably well.
As far as the Bible goes, the flat Earth surrounded by ocean and under a sky dome is certainly less sophisticated than a reasonably intelligent observer with eyes only could make.