Time and space are fundamental concepts in understanding the universe.

Time refers to the continuous progression of events from the past, through the present, to the future. It is a dimension in which change occurs and is often measured using clocks and calendars. Time plays a critical role in our perception of motion, causality, and the sequence of events.

Space refers to the boundless three-dimensional extent in which objects and events occur and have relative position and direction. It provides the stage where physical phenomena take place, often visualized in terms of dimensions like length, width, and height.

In physics, the interplay of time and space is described by Einstein's theory of relativity, which merges them into a single entity called spacetime. This concept reveals that time and space are interconnected, dynamic, and influenced by gravity and velocity, shaping our understanding of the cosmos.