Final answer:
The universe, if infinite, does not have a center since the Big Bang was not an explosion from a point but an expansion of space itself. Therefore, the concept of a center is irrelevant, as the universe is uniformly expanding in all directions, making it isotropic.
Step-by-step explanation:
If the universe is infinite, it does not have a center in the conventional sense, which makes the concept of a center irrelevant. When considering the universe's beginning with the Big Bang, it is often misunderstood that the Big Bang occurred at a specific point and expanded outward from there. However, the Big Bang should be thought of not as an explosion in space but as an expansion of space itself. Every point can be considered the center from its own perspective because, from any given point, the expansion appears uniform in all directions. This is consistent with the observation that the universe is isotropic and expanding, as evidenced by the cosmic microwave background radiation (CMBR) which is the redshifted afterglow of the Big Bang.
In effect, a hypothetical observer in any galaxy will see other galaxies moving away from them, just as we do from our vantage point on Earth. This phenomenon contributes to the understanding that the universe has no discernible center or edge. The expansion is not from a point outwards but rather a uniform stretching of space, meaning if the universe is indeed infinite, it lacks a center since every part of it is expanding away from every other part. This is further supported by the concept of an open universe, which posits an infinite expanse that continues to grow without an endpoint.