Astronomical Unit is a length unit used to express distance, size or travel range in practical measurement work.
Astronomical Unit became established as a practical length unit in technical, commercial or scientific use.
Measurement system: Metric, imperial and internationally standardized length usage. SI equivalent: 1 AU = 1.495979e+11 m.
Astronomical Unit facts
- Unit name
- Astronomical Unit
- Symbol
- AU
- Category
- Length
- Measurement system
- Metric, imperial and internationally standardized length usage
- SI equivalent
- 1 AU = 1.495979e+11 m
- Common uses
- Distance, dimensions, navigation and physical measurement
Definition of the astronomical unit
Astronomical Unit is a length unit used to express distance, size or travel range in practical measurement work.
Measurement system and SI relationship
Metric, imperial and internationally standardized length usage
SI equivalent: 1 AU = 1.495979e+11 m
History of the astronomical unit
Astronomical Unit became established as a practical length unit in technical, commercial or scientific use.
Where is the astronomical unit used?
Distance, dimensions, navigation and physical measurement
Astronomical Unit conversion tools
Sources
The definitions and conversion relationships on this page are aligned with standard metrology and SI reference material.