There are recorded lunar eclipses with both the sun and moon both in the sky above the horizon, yet the earth is somehow casting a shadow? Other times when both the sun and moon are in the sky it's not always casting a shadow. Something else is causing the "shadow," it's not earth.

Also, a sphere casts a curved shadow on a flat surface, but not on another sphere, then it's flat.

The moon also isn't reflecting the sun's light. It's cooler than in the shadow, spheres don't reflect light on an entire face like the moon (there's a localized focal point), and the Bible makes it clear that the moon shines HER (the sun is masculine) own light. The sun also isn't a giant ball of burning gas explosions, it's more like a transformer.