What Does ET Stand For?
ET stands for Ephemeris Time
Ephemeris Time (ET) is a time standard used in astronomy, originally developed to provide a uniform measure of time for the motion of celestial bodies. It is based on the periodic motion of these bodies, specifically designed to account for relativistic effects and the irregularities in the Earth's rotation. ET serves as a reference for calculating positions of objects in the solar system and is crucial for precise astronomical observations and navigation.
Added on 14th April 2008 | Last edited on 16th June 2025 | Edit Acronym