What is it made of? Is it physical or just a concept? Why does mass bend it?
In: 2
> What is it made of?
It’s not made out of everything.
> Is it physical or just a concept?
The difference between these two is just a philosophical question.
> Why does mass bend it?
Because that’s how our universe works.
If you ignore the time part, it’s just space. You have some position, I have some position, everyone else has their own position. That is something we can measure. We can measure distances between positions, angles, and so on. We can also specify when something happens. If we want to meet, we’ll need to say where and when. That defines one “place” in space and time together.
We learned that treating space and time completely separately doesn’t work. We describe both together as spacetime. The meeting point is now one point in spacetime. We can measure distances between points in spacetime, too.
Latest Answers