Physics
Spacetime Geometry
Quick fact
The Earth's mass curves spacetime so much that light passing near it appears to bend slightly.
Why this is interesting
Imagine a rubber sheet stretched tight—when you place a heavy object on it, the sheet bends. This is how gravity works in spacetime.
Read the full explanation
Understanding Spacetime Geometry
Spac, time geometry describes space and time as a single four-dimensional fabric. Massive objects like stars or planets warp this fabric, causing nearby objects to move along curved paths—this is what we perceive as gravity.
A deeper explanation
In Einstein's General Relativity, spacetime geometry is the framework that explains how mass and energy influence the structure of space and time. The presence of a massive object causes a curvature in this geometry, which dictates how objects and light move through it. This geometric interpretation replaces Newton’s idea of gravity as a force with a dynamic interaction between matter and the fabric of spacetime itself.