NoNukes writes:
Moses would not be restricted to using a single word to communicate with. He did not have to use a tent as the example if he wanted to describe something that was not tent-like.
But the author of the Moses character was still very ignorant but he was learning and had no idea what the reality of the universe was and believed that when he looked at the heavens he was looking at a solid screen like a tent or great blanket.
He believed he was not looking at space and stars but rather a thin, uniform, fixed fabric that moved across the night in a regular and predictable pattern. And it was not a good fabric like his tent because it did have holes in it and it did leak and let the water that was above the fabric drip through as rain.