- #1

John Constantine

- 19

- 4

- TL;DR Summary
- Can perfectly flat spacetime exist in the universe?

According to general relativity, mass and energy cause the curvature of spacetime. To have perfectly flat spacetime, there must be a completely empty vacuum state with no mass or energy. Does this mean that perfectly flat spacetime cannot exist if mass and energy are present?

Let's assume that mass and energy are present in space.

I am not a physics major nor have I studied physics in depth; I am an ordinary person.

Let's assume that mass and energy are present in space.

**Theoretically, is it possible to create perfectly flat spacetime, even locally, by precisely arranging mass and energy in the universe?**I am not a physics major nor have I studied physics in depth; I am an ordinary person.