Astronomical unit
(Reguidit frae Astronomical Unit)
An astronomical unit (abbreviatit as au;[1] ither abbreviations that are sometimes uised include ㍳, a.u. an ua[2]) is a unit o length nou defined as exactly 149597870700 m (92,955,807.3 mi),[3] or roughly the average Yird–Sun distance.
| astronomical unit | |
|---|---|
| Unit seestem | Astronomical seestem o units (Acceptit for uise wi the SI) |
| Unit o | length |
| Seembol | au or ua |
| Unit conversions | |
| 1 au or ua in ... | ... is equal tae ... |
| km | 149.6×106 |
| mi | 92.956×106 |
| pc | 4.8481×10−6 |
| ly | 15.813×10−6 |
References
eedit- ↑ International Astronomical Union, ed. (31 August 2012), "RESOLUTION B2 on the re-definition of the astronomical unit of length" (PDF), RESOLUTION B2, Beijing, Kina: International Astronomical Union, retrieved 11 Mey 2013,
The XXVIII General Assembly of International Astronomical Union recommends [adopted] … that the unique symbol “au” be used for the astronomical unit.
- ↑ Bureau International des Poids et Mesures (2006), The International System of Units (SI) (PDF) (8th ed.), Organisation Intergouvernementale de la Convention du Mètre, p. 126
- ↑ International Astronomical Union, ed. (31 August 2012), "RESOLUTION B2 on the re-definition of the astronomical unit of length" (PDF), RESOLUTION B2, Beijing, Kina: International Astronomical Union, retrieved 19 September 2012,
The XXVIII General Assembly of International Astronomical Union recommends [adopted] that the astronomical unit be re-defined to be a conventional unit of length equal to exactly 149 597 870 700 meters, in agreement with the value adopted in IAU 2009 Resolution B2