I'm not talking about redactions, but the Bible does say that the earth is spherical, while other ancient cultures had beliefs like it was an egg on a turtle's back. But the Bible does not promote such beliefs, and while Isaiah or the other Bible writers did not have a telescope or Newton and Einstein to talk to, it is written and does not waver, that the earth hangs on nothing -- that it is round or spherical.
Isaiah 40:22 - It is he who sits above the circle of the earth, and its inhabitants are like grasshoppers; who stretches out the heavens like a curtain, and spreads them like a tent to dwell in;
It is consistent in its analogies, not wavering in description or analysis. (We can't 'see' gravity...these writers spoke in the language they knew, from inspiration by God.)