What is the time?

Time is one of the times when a point moves relative to a coordinate system, and the straight line, line segment or curve formed by its movement is a point at rest relative to the coordinate system. Each point corresponds to multiple times. Relative to a certain time, the faster the stagnation point starts to move, the slower the time. When the speed is the same as the moving point in this time, time stops. When the speed exceeds this point, it is equivalent to going back to the past.

Time is the expression of the continuity and sequence of material movement and change. The concept of time includes two concepts: time and time period. Time is a parameter used by human beings to describe the process of material movement or the occurrence of events, which determines time.

It depends on the law of periodic change of matter that is not affected by the outside world. For example, the moon revolves around the earth, the earth revolves around the sun, the earth rotates, and atoms oscillate. Einstein said that time and space are an illusion of people's cognition.

Extended data:

Time scale system

1, UTC

Greenwich Mean Time: Also known as Universal Time. Greenwich mean time. Not only astronomers use GMT, but the term often appears in newspapers.

2. Coordinated Universal Time

Universal time is measured by astrometry, but due to various factors, there will be a slight error compared with atomic time. In order to coordinate universal time and atomic time, scientists are dealing with coordinated universal time.

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