Scepti, one of the most famous - for its innovativeness and precision, given the time when it was conducted - experiments related to gravitation is what is known as the Cavendish experiment. It was conducted right at the end of 1700's, and was able to provide the value of gravitational constant with a high precision given it all happened before even year 1800. It involved measuring the force twisting a wire upon which a set of lead orbs of known dimensions and mass was hanged, when a set of much heavier orbs was placed in their vicinity.
Have a read a bit about it if you have time to do this. How would you explain your "denpressure" causing the described behavior?
And, to keep it all on topic: if the Moon and the Sun are both reflections of the same light source(where the Moon is like a "second" bounce, if I remember correctly what you have said about it a while ago), how comes the Moon can even exist? If the dome is a perfect mirror, as in it reflects the light without scattering in other directions, and at any point of time the Sun is visible on any given point of the "dome" from some place on Earth(meaning that for any elevation and heading of your choosing relative to the surface, there is a place on Earth from which the Sun will be seen exactly at these coordinates), where on the dome is the "last" source for the light which's next "bounce" ends up as what we see as the Moon?
If all of the Earth's Sun is some reflection of the same single original light source, and the reflection from any point of dome ends up shining somewhere on Earth, where on the dome does the Moon's "previous" light actually come from? Or do you claim that light can "perfectly" bounce to several directions at once from a single point and direction?
Oh, and the last one about this: how does this match with the fact that relative positions of the Sun and the Moon change all the time?