Is the universe a sphere?

Question

Leah Abbate · Accepted Answer

The universe is believed to be many shapes which varies as following:

Flat and infinite/finite
Curved like a shell and finite
Curved outwards and infinite
These are not certain or proven.
The universe's shape is determined by its density: if it is higher than the critical density, it is closed and curved like a sphere; if it is lower, it will curve like a saddle. However, if the universe's actual density is the same as what scientists believe it to be, then it will stretch out forever like a flat sheet of paper. Credit: NASA/WMAP Science team. - Source https://tutor.hix.ai Various religions also hold that the universe's shape supports their own doctrines. Another widely held misconception is that space is a "fabric," which is somewhat accurate given that there is "dark matter" in space and space is not a complete vacuum. The film "Interstellar" demonstrated how accurately the "fabric" of space is warped by connecting it to various theories. To restate, however, the universe is theoretical rather than proven to be:

Elena Antonova · Answer

undefined No, the universe is not a sphere. It is generally considered to be spatially flat or possibly slightly curved on very large scales, according to current cosmological models.