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The astronomical system of units, formerly called the IAU (1976) System of Astronomical Constants, is a system of measurement developed for use in astronomy. It was adopted by the International Astronomical Union (IAU) in 1976 via Resolution No. 1, and has been significantly updated in 1994 and 2009 (see Astronomical constant).
- Astronomical unit - Wikipedia
The astronomical unit (symbol: au, or AU) is a unit of...
- Astronomical unit - Simple English Wikipedia, the free ...
The astronomical unit ( AU) is a unit of length derived from...
- Astronomical unit - Wikipedia
El sistema astronómico de unidades, llamado formalmente «Sistema de constantes astronómicas de la IAU (1976)» (en inglés, IAU (1976) System of Astronomical Constants), es un sistema de unidades desarrollado para su uso en astronomía.
In astronomy, coordinate systems are used for specifying positions of celestial objects ( satellites, planets, stars, galaxies, etc.) relative to a given reference frame, based on physical reference points available to a situated observer (e.g. the true horizon and north to an observer on Earth's surface). [1]
Astronomical unit, a unit of length effectively equal to the average, or mean, distance between Earth and the Sun, defined as 149,597,870.7 km (92,955,807.3 miles). The astronomical unit provides a convenient way to express and relate distances of objects in the solar system and to carry out astronomical calculations.
- The Editors of Encyclopaedia Britannica
18 de may. de 2020 · Astronomical units, abbreviated AU, are a useful unit of measure within our solar system. One AU is the distance from the Sun to Earth's orbit, which is about 93 million miles (150 million kilometers).
