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
You are having confusion with the “plane” of our galaxy. It really has little to do with 4D spacetime and is just a natural result of gravity and momentum.
Our galaxy is roughly flat. This is the plane that you are talking about. But this is only *roughly* true. There is nothing that says that parts of our galaxy must lie exactly on this plane. There are many many galaxies in the universe and they are in all directions with all orientations of their own “planes” and I’m sure some galaxies are round rather than flat and thus don’t have a plane.
Spacetime is not a fabric as in a 2D sheet/plane. We call it a fabric because it can stretch and that is easy to show with textiles. Space-time has three physical dimensions and if you wanted you could just fly your rocket ship above the plane of our galaxy to visit the globular clusters of stars you are talking about.
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