The existence of the 'dark sun' is relatively unexplained scientifically, but rest assured the powers that be through work undertaken by physicists, astromoners, and other experts in specific fields of knowledge, do know of its existence, and how it appears to transform electromagnetic energy created between 'it' and the positive influence of the sun, and the negative influence of the moon, which intereact with one another in the firmament of the earth! This reaction lies at the fundamental heart of what is the 'invisible barrier', the 'dome', or whatever term or name anybody wants to give to it!
I believe that the orbit of this 'dark sun' travels around and above the flat earth inside the so called 'invisible barrier', and that the corresponding orbits of the sun and the moon fluctuate between the aforementioned 'invisible barrier' (earths dome), outside, and sometimes inside 'it', which produces the phases of the moon, the eclipses, and everything else, or whatever...
As I say, the 'dark sun' is trapped inside the the earths dome, whereas the sun and the moon, appear to fluctuate, outside, inside, and within the 'invisible barrier' itself, at one time or another...
The relationship between the positionss at any one time of the sun, the moon, the 'dark sun' and the earth, seems tto me to be at the heart of a continual source of electromagnetism which provides that which is the dome of the earth!