# Why does the Earth seem to be round in 3D, and what would it look like in 4D?

Sorry but I have read this question

How exactly does curved space-time describe the force of gravity?

and the answer by joseph f. johnson, where he says:

"Newton did not realise that space-time could be curved and that then the geodesics would not appear to our sight to be straight lines when projected into space alone. That ellipse you see in pictures of planetary orbits? It is not really there of course since the planet only reaches different points of the ellipse at different times...that ellipse is not what the planet really traverses in space-time, it is the projection of the path of the planet onto a slice of space, it is really only the shadow of the true path of the planet, and seems much more curved than the true path really is.

( ¡ The curvature of space-time in the neighbourhood of the earth is really very small ! The path of the earth in space-time would even appear to be nearly straight to an imaginary Euclidean observer who, in a flat five-dimensional space larger than ours, was looking down on us in our slightly curved four dimensional space-time embedded in their world. It's ctct, remember, so the curving around the ellipse gets distributed over an entire light-year, and appears to be nearly straight...and is straight when one takes into account the slight curvature of space-time.)"

My question is, if we see the earth round, is that too because of what he describes? So in 4D, the earth looks flatter? Why does the earth curve spacetime so much seemingly, that it makes the earth look round, and everything falling towards the center? In 4D earth would look like what?

Question#2: Analogy of this to the rings of Saturn. In 4D they would look straight? Since they are just orbitals of rocks around Saturn. There orbitals would look like a straight line in 4D? But if that is true, then they must be allocated along a section only, since it is a finite number of rocks. But then they must have a beginning and an end. So where would that line section start, at which rock?