The other thing to consider is that as home technology improves, those covering up "the lie" have to up their game. A few hundred years ago, the planets were just a bright dot in the sky that moved differently from the stars. Later with the advent of photography, professional setups could give greater detail of the likes of Juipter and Saturn. Photos were released to the public and yes they were asked to believe these fuzzy images were really like what they really looked like close up.
Then you had people like the Herschels who ground their own mirrors and made large scope for others and they could see these things for themselves, but perhaps those rich people were in on it too. The idea of nebula like what you posted was unknown and in the late 1700s, Charles Messier noted quite a few in his catalogue of annoying objects he could not explain, that could be mistaken for comets and needed to be discounted from comet observations. These days they are the defacto list of objects of really interesting things to look at in the night sky if you have a reasonable sized telescope.
These days, someone like myself can produce a decent image of Jupiter with a few hundred quid of equipment. Those who spend a couple of thousand can really produce some 'wow' pictures. If what is up there is faked then someone is putting a lot of effort into staying a step ahead of those in the western world who can buy decent equipment from a handful of specialist high street stops or on line.
It is easy for a flat earther to say "yeah fake" and our resident nutter even said above "night sky?" like that doubts there is a sky at night. WTF??? But when anyone who spends a few quid can look at this, you uncover a whole new level to the conspiracy. If this stuff has been faked for thousands of years, the secret society of fakers is spending masses of money keeping ahead of everyone else, right down to the general public. It starts to unravel into an incredibly complicated thousand year old global influencing society with the aim to go out and trick people for reasons we can't begin to understand.
I do think it is quite interesting to think of how a flat earth and a dome would work and how a conspiracy and cover up would work. In both cases, it just doesn't. Well the conspiracy would but with such levels of cooperation, planning and secrets it is just staggering. But then that is why the conspiracy nutters are quite guarded. Take the above example, attack the common accepted truth and repeatedly demand proof, but offer nothing in return. No shape, no map, no explanation, not even a hint. If there is nothing there, nobody can attack your model.
