Are you saying that a pea held at arm's length, according to the FE model, would appear roughly the same size as the moon, if you held the pea up next to the moon?
I can block the moon out with my thumb at an arm's length (I've used that to get an idea of framing for moon photography before), though I've never tried it with a pea. I would guess a pea might be quite close to the moon's size at arm's length though.
Oh, and as for measurment, how did we come up with the distance from the earth to the moon/sun in RE cosmology? Math. They probably popped in some measurments including the apparent width of the moon in the sky, an arbitrary size for it, and then figured the distance. Something had to be completely arbitrary there, I'm thinking.
One last thing: I've looked through telescopes and even taken photos with my camera of the moon. When you get a close look, you can clearly see that there's a bunch of land there, not just something giving off light. It's bright, yeah, but it's enough that the human eye and a camera's exposure settings can take a very decent image of it showing that there are craters and such. What mechanism is giving off light from the moon? The sun is fusion, I'm sure everyone can agree to that, but what is the moon's source of light if not the sun?