Linked from

The 12 pages that link to Universal Time, each with the reason it gives.

• Earth’s rotationRelated: Universal Time tracks rotation for astronomy and geodesy.

• Sidereal timeCompared with: It is a terrestrial timekeeping reference, whereas sidereal time tracks stellar orientation.

• Greenwich Mean TimeRelated: Universal Time replaced GMT as the precise name for rotation-based global time.

• Relativity of simultaneityCompared with: Special relativity replaces universal simultaneity with frame-specific time coordinates.

• Leap secondRelated: The difference between this rotational time and atomic time determines when a leap second is needed.

• Nautical almanacRelated: It provides the time framework for converting observation times into predicted celestial positions.

• Earth orientation parametersRelated: UT1 carries the rotation-rate information represented in orientation data.

• Paris ObservatoryRelated: The observatory’s timekeeping work contributed to the broader problem of establishing standardized time.

• Prime meridianRelated: Its conventional zero-longitude reference is the modern Greenwich meridian.

• International Atomic TimeCompared with: TAI’s uniform atomic progression differs from rotation-based Universal Time.

• Astronomical tablesRelated: Astronomical predictions required consistent time references to compare calculated and observed positions.

• The Astronomical AlmanacRelated: Many tabulated events and calculations are tied to Universal Time.