A distant object would have an absence of parallax.
Also, if that astral body is a gazillion miles away, how are you going to get two perspectives on it to see if there is parallax or not? Even if you do that, you can't prove it's not a hologram.
Holograms, iphone screens... what are you even on about? Are you alluding to the firmament, e.g. the idea that stars are merely dots of light painted on a surface very near to earth? Have you been reading the bible or something? Read this instead: https://en.wikipedia.org/wiki/Stellar_parallax If you're going to wander off into lala land, you at least owe it to yourself to understand the theories and evidence you are casually discarding.
You believe in singularities, but want to accuse me of going bible? Please! Your black holes, heat death, and big bang are all singularities of MATH EQUATIONS, with zero evidence of being real!
Edit, in fact all those singularities are gone if you take infinity out of the equation. Infinity is also not real. Can you prove infinity is real?