Anons, I don't know what to make of the dome earth or…forgetting the word used, to hide the real sky?

Anyways, I was looking at this picture and noticed something. Maybe you can explain it more rationally? But this seems interesting enough to risk the "KYS FLAT TARD". Which I am not. My stance is none of us know the truth. Might be round, might be flat, might be hidden. I don't fucking know.