They're ludicrous ...
This is the typical reaction from the powerful brainwashing. No, it’s not just Eric Dubay. There are literally dozens of scientific books from the 19th century making the case for Flat Earth, and many of the arguments cannot be refuted. There is a model, but no it doesn’t provide all the answers. But then 90% of all science that’s taught as dogma to schoolchildren is actually just theory, and their theories are falling apart even to the admission of many mainstream scientists. So excuse Flat Earth for having some theory as well. If you allowed yourself to open your mind, shake the brainwashing, and look objectively at the facts, you’d come to the same realization.
As far as the moon, it’s often translucent, where you can actually see stars through it. There are daytime eclipses for which science has no explanation, just speculation. Shadows can be caused by any number of things. But if they’re caused by the earth, then how can there be eclipses when the sun is visible in the sky.
I don’t want to go into the evidence here, but the preponderance of evidence is overwhelmingly in favor of our living on a flat plane enclosed by a firmament above. Sacred Scripture clearly also describes the world that way.