I'd like them to look for repeats of galaxies. Galaxies that may be the same but slightly different or in different parts of the universe. If the universe was its own black hole we might see like a sort of kaleidoscope effect
The trouble with that is the difference in time. Since the light has to travel such a vast distance, multiple images of the same galaxy will show different stages of maturity. Even the stars will have been recycled. It would be extremely difficult, if not impossible, to ever demonstrate that two galaxies separated by billions of light years are actually the same galaxy in a curved Universe.
I believe that would be a Torus-shaped universe that could produce that effect, basically a donut where space loops back in on itself. I think it's something that's been considered, though it sounds as if there's no evidence for or against that idea, and it's not considered likely.
I'd like them to look for repeats of galaxies. Galaxies that may be the same but slightly different or in different parts of the universe. If the universe was its own black hole we might see like a sort of kaleidoscope effect
The trouble with that is the difference in time. Since the light has to travel such a vast distance, multiple images of the same galaxy will show different stages of maturity. Even the stars will have been recycled. It would be extremely difficult, if not impossible, to ever demonstrate that two galaxies separated by billions of light years are actually the same galaxy in a curved Universe.
I believe that would be a Torus-shaped universe that could produce that effect, basically a donut where space loops back in on itself. I think it's something that's been considered, though it sounds as if there's no evidence for or against that idea, and it's not considered likely.
https://www.forbes.com/sites/startswithabang/2021/07/21/why-the-universe-probably-isnt-shaped-like-a-donut/?sh=11e56b426e60
My money is on a dodecahedron.