# spacetime metric

The "spacetime metric" is a fundamental concept in the theory of relativity, crucial for understanding the geometric and causal structure of the universe.

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## Definition

### C2General Relativity

(technical, academic)A mathematical function that describes the geometry and curvature of spacetime.

#### Example

- The spacetime metric is essential for calculating how objects move in the presence of gravitational fields.

### C2Physics

(technical)A tensor that defines distances and angles between nearby points in spacetime, incorporating both spatial and temporal dimensions.

#### Example

- Physicists use the spacetime metric to determine the interval between two events in spacetime.

### C2Astrophysics

(technical)A tool used to measure the geometry of the universe, particularly in curved spacetime.

#### Example

- In astrophysics, the spacetime metric helps in understanding the structure and expansion of the universe.