The crazy thing to me is that as you look at galaxies further away, they become bigger in the sky. Obligatory xkcd: https://www.explainxkcd.com/wiki/index.php/2622:_Angular_Diameter_Turnaround There could be huge dragons out there occluding half the sky, but they’d be beyond the last scattering surface of the cosmic microwave background.
The crazy thing to me is that as you look at galaxies further away, they become bigger in the sky. Obligatory xkcd: https://www.explainxkcd.com/wiki/index.php/2622:_Angular_Diameter_Turnaround There could be huge dragons out there occluding half the sky, but they’d be beyond the last scattering surface of the cosmic microwave background.