If Spacetime is a “fabric” how are objects in space on a different plane?

Question

Okay so spacetime curves and light follows that curve. So how are Globular Clusters “above” our plane? And then is there anything DIRECTLY below the Globular Cluster? How does that work unless it’s 4D but the 4th D is time and time follows “causality?” and doesn’t go up? Help my brain hurts a little

In: Physics

Answer 1

Space is three dimensional, which allows things to be “above”, “below”, etc; that’s what defines the words such as “above” and “below”. Spacetime, is by definition four dimensional (adding the dimension of time onto three of space). When mass curves spacetime, it curves it locally, but that doesn’t mean that any of the dimensions are lost – even in locally curved spacetime around say Earth, you still have three spatial dimensions clearly evident.