Dictionary

astronomical unit en · NOUN

Pronunciation

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Meanings

1. 149,597,870,700 metres, the approximate mean distance from the Earth to the Sun (the semi-major axis of Earth's orbit), (symbol AU), used to measure distances in the solar system.
   • Now this big quarter of a Jupiter mass planet is in an orbit about Zeta 2 Reticuli which lasts 18.9 days and has a Semi-Major Axis of 0.14 Astronomical Unit (AU). For comparison Mercury has a Semi-Major Axis of 0.387 AU equal to 36 million miles and Earth has a Semi-Major Axis of 1.00 AU equal to 92.9 million miles. Now if we assume that this newly discovered planet, which we will name Reticulum 1 in accordance with Bob Lazar’s convention, is the closest one to Zeta 2 Reticuli (it’s hard to imagine a closer one), then following Bode’s Law (the law which states each planet is about twice the distance from it’s sun as its inner neighbor) Reticulum 2 should be at 0.28 AU, Reticulum 3 should be at 0.56 AU and, INTERESTINGLY, Reticulum 4 would be at 1.12 AU in between the Earth’s 1.00 AU and Mars’s 1.52 AU, well within the “life-zone” of a G class star! 2000 April 10, Joe LeSearne, “Zeta 2 Reticuli : Home System Of The Greys?”, in http://www.gravitywarpdrive.com/, retrieved 05 Aug 2012:
   • Gagarin Station is the largest deep space station built by humanity, a "Bernal Sphere" designed with a 500-meter-diameter habitable area. It was constructed beyond Pluto, nearly 80 Astronomical Units (12 billion kilometers) from Sol. Moving crew and materials to this location bankrupted most of the backers. 2008, BioWare, Mass Effect, Redwood City: Electronic Arts, →ISBN, →OCLC, PC, scene: Stations: Gagarin Station Codex entry:

Forms

Synonyms

a.u. · ua · ㍳ · au · AU · a. u. · A. U. · A.U.

Translations (55)

scn unità astrunòmica (measure of distance) · sah астроном кээмэйэ (measure of distance) · de Astronomische Einheit (measure of distance) · da astronomisk enhed (measure of distance) · cs astronomická jednotka (measure of distance) · sk astronomická jednotka (measure of distance) · et astronoomiline ühik (measure of distance) · yue 天文單位 /天文单位 (measure of distance) · hi खगोलीय इकाई (measure of distance) · eo astronomia unuo (measure of distance) · pa ਖਗੋਲੀ ਇਕਾਈ (measure of distance) · th หน่วยดาราศาสตร์ (measure of distance) · ar وَحْدَة فَلَكِيَّة (measure of distance) · sl astronómska enòta (measure of distance) · gl unidade astronómica (measure of distance) · sv astronomisk enhet (measure of distance) · ms unit astronomi (measure of distance) · ko 천문단위 (measure of distance) · fr unité astronomique (measure of distance) · ta வானியல் அலகு (measure of distance) · fi tähtitieteellinen yksikkö (measure of distance) · pt unidade astronómica (measure of distance) · es unidad astronómica (measure of distance) · el αστρονομική μονάδα (measure of distance) · he יחידה אסטרונומית (measure of distance) · oc unitat astronomica (measure of distance) · bg астрономи́ческа едини́ца (measure of distance) · nn astronomisk eining (measure of distance) · la ūnitās astronomica (measure of distance) · ro unitate astronomică (measure of distance) · eu unitate astronomiko (measure of distance) · ga aonad réalteolaíoch (measure of distance) · hu csillagászati egység (measure of distance) · be астранамічная адзінка (measure of distance) · fi astronominen yksikkö (measure of distance) · ja 天文単位 (measure of distance) · ca unitat astronòmica (measure of distance) · nb astronomisk enhet (measure of distance) · fa واحد نجومی (measure of distance) · nan-hbl 天文單位 /天文单位 (measure of distance) · kk астрономиялық бірлік (measure of distance) · pl jednostka astronomiczna (measure of distance) · ur فلکیاتی اکائی (measure of distance) · mt unità astronomika (measure of distance) · pt unidade astronômica (measure of distance) · ms satuan astronomi (measure of distance) · lv astronomiskā vienība (measure of distance) · ast unidá astronómica (measure of distance) · it unità astronomica (measure of distance) · is stjarnfræðieining (measure of distance) · tr astronomik birim (measure of distance) · uz astronomik birlik (measure of distance) · ru астрономи́ческая едини́ца (measure of distance) · cmn 天文單位 /天文单位 (measure of distance) · lt astronominis vienetas (measure of distance)