Space is like a cake.
In the end, we all just end up taking different slices out of it. Time is included with that cake as the icing.
Either way, we can all perceive the cake differently from different frames of reference, and in the end, we are all correct; the only fact that we can all agree on is that we are seeing an aspect of that cake.
You can't look at the cake from the top and see the bottom (at least from how I'm trying to state it), nor can you go from the side and see the other side, you can only see some part of that cake, and from what you see you can ascertain what part of the cake you are seeing, and compare what you see in that cake to what another person may see in that cake.
You get what I mean! :-;