I was looking at how our solar system works and see that essentially the curvature from space and gravity or, lack of creates the movement of our planetary systems. I couldn’t seem to make sense of the details of how space is similar to a fabric and can be shaped in some way.
The example used was the age old blanket with a bowling ball in the center creating a wide curvature leading to the edges of the blanket.
How is this possible but can’t be seen, nor does it cause friction?
In: 2411
Because spacetime isn’t a substance, it isn’t a thing. Spacetime is hard to describe as anything other than a fabric, but it’s not a literal fabric of material that bends. If you imagine instead the universe as a play, the particles are the actors, the fundamental forces are the words and the script, but spacetime is the stage. Spacetime is the medium in which things exist, and it can just curve and bend. Why? It just can.
And slightly off-topic, a physical thing can be completely invisible if it doesn’t interact with light at all. An example of this is the neutrino. Every second, over a trillion neutrinos pass through your body. But they can’t be seen, and they can’t do any harm, because they don’t interact with light. They are literally as invisible as anything can ever be.
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