Time scale

A time scale specifies divisions of time.

Time standard, a specification of either the rate at which time passes, or points in time, or both
Duration (disambiguation), a quantity of time

Geological time scale, a scale that divides up the history of Earth into scientifically meaningful periods

In astronomy and astrophysics:
- Dynamical time scale either (in stellar physics) measures the length of time over which changes in one part of a body can be communicated to the rest of that body, or (in celestial mechanics) is a realization of a time-like argument based on a dynamical theory
- Nuclear time scale, estimates the lifetime of a star based solely on its rate of fuel consumption
- Thermal time scale, estimates the lifetime of a star once its fuel reserves at its center are used up or if they were to disappear

In cosmology and particle physics:
- Planck time, the time scale beneath which quantum effects are comparable in significance to gravitational effects

In mathematics:
- Time scale calculus, the unification of the theory of difference equations with differential equations

In music:
- rhythm, a temporal pattern of events
- Time scale (music), divides up music into sections based on the scope

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