In modern physics, space is a "boundless four-dimensional continuum" known as spacetime. Disagreement exist about whether it is an entity (something that actually exists). It may be just a relationship between entities, or part of a conceptual framework.
Before Einstein's work on relativistic physics, time and space were viewed as independent dimensions. Einstein's discoveries have shown that due to relativity of motion space and time can be mathematically combined into space-time.
Notes[change | change source]
- This definition combined with present definition of time makes our space-time to be Minkowski space and makes special relativity absolutely correct simply by definition.