spacetime; space-time
Physics term referring to the four-dimensional continuum combining space and time.
In Einstein's theory, gravity is explained as a curvature of spacetime.
Travel beyond spacetime is often depicted in science fiction works.
In the story, the protagonist crosses spacetime to another world.
The theory explains that strong gravity causes spacetime to warp.
The idea of traveling through spacetime with a time machine is a staple of science fiction.
That being is said to have appeared from beyond spacetime.
空間 means space or spatial extent by itself, whereas 時空 fuses that space with the dimension of time.
Compound of 時 (time) and 空 (space), directly corresponding to the English 'spacetime'. The term was coined in the context of modern physics.