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

One of the common ways to introduce space-time is to present it as a flat 2d plane, like a fabric blanket stretched taut. If a heavy object is placed on the blanket, it’s easy to see how the mass will distort the shape of the fabric. This metaphor is where the term “space-time fabric” comes from.

However, the intuitive understanding it provide starts falling apart as we move in 3-dimensions.