It is impossible to create a correct 3D map of the observable part of the universedue to the fact that what we see around us is not a three-dimensional space. Eachobject we observe is distant from us not only in space but also in time. What we seeis a fragment of spacetime, and if we try to imagine it as a three-dimensional space,various deformations and incorrect determinations of distances and sizes of distantobjects occur.Regardless of whether real space is curved or flat, the observed part of the universecan be modeled as system of spheres (which differ in the time it took for the lightto reach us from a given sphere) distributed in a certain way in spacetime. In orderto correctly imagine the observable part of the universe, a four-dimensional map isnecessary. In this paper, I present one possible solution for constructing a 4D map ofthe universe. One may be surprised at how big the differences can be in comparison toa 3D map, which treats the observable part of the universe as three-dimensional space.