Is the Universe a sphere? If not, which shape it is? How do we know that?
Shouldn’t the shape of the universe be a 3D sphere?
Do you believe the Earth is flat or in the shape of a sphere? Can a sphere be represented in form of 2D? Why do extraterrestrial bodies always appear as a spherical shape? Why not square or cylindrical? Are we actually seeing 3D? Are we assuming 2D to 3D? Why are the shapes of planets and stars spherical? Why aren't they square or any other shape? What would happen if the shape of earth became a hollow semi-sphere? Would it be possible to stand on the inner surface? Why are stars and planets spherical instead of having other shapes? Why are planets spherical? How can we imagine the 4th dimension? Do spheres actually have 8 sides? Wouldn't the event horizon of a black hole be a sphere around the central mass? Why can't planets be different shapes? What is the best explanation of what a 4-dimensional world would look like? If there is no gravity in space, why are planets spherical? How many dimensions does the universe really have? Why are all planets spherical? Are 2d material really two dimensional? If the curvature of a singularity of a black hole is infinite, would this suggest that it is spherical? What would it look like to be inside a 3-sphere? What is 3D actually? How do flat earth believers explain the spherical shape of other planets and moons? Does the 4th spatial dimension actually exist? Why can so many people believe, without question, that the Earth is round but not that it might indeed be flat? Is everything non-euclidean geometry? If the Earth was a cube, how and why would the gravity be different? Is it possible that our xyz are 2nd, 3rd & 4th dimensions, and the 1st (smallest) one isn't well understood? If all the mass in the universe was condensed into two separate and equal spheres, would they remain in perpetual orbit around their center of mass? Why are all planets spheres? If gravity is caused by warped spacetime, what dimension is it being warped? The 4th dimension? How many dimensions are there in our universe?