How did these men know these scientific facts when the whole world thought the world was flat for thousands of years later?
Proverbs 8:26-29, "Before Yahweh made the earth or the fields, or any of the dust of the world, I, was with Him. When He prepared the heavens, I, was there. When He drew a circle on the face of the deep, When He established the clouds above, and securely fixed the fountains of the deep."
Iyowb (Job) 26:7, "He stretches out the north sky over an empty space, and He hangs the earth upon nothing."