They call it the “fabric of reality” because that’s a good metaphor to describe how gravity works. (Or at least I assume that’s where it came from, I could very well be wrong.)
When you stretch a fabric thin, and place something heavy in it, it’s going to sink and stretch the fabric down with it. Then, if you place a smaller object next to the larger one, it’s going to roll around the larger one, gradually moving closer as it goes down the slope created by the larger object.
That might be hard to visualize, so here’s a neat video I found.
Edit: guys I think you’re reading too much into this I wasn’t trying to provide a foolproof explanation of how gravity works I was just trying to relate an interesting metaphor to a piece of linguistics.
And I wasn’t even right, a quick google search says the term predates our understanding of the universe. Its probably a coincidence.
One could be picky and say you’re explaining gravity with gravity. But for the sake of simplicity that’s OK.
I’ve once read an article where someone complained about that and tried to explain it with the actual cause, curvature of space time, like using a model car with glue attached to the wheels. But that was not really intuitive and simple to understand.I find the metaphor frustrating because of that.
This video includes a much better representation of what gravity is IMO. The creator had the same issue with people describing gravity with gravity.
