Kilometer to Astronomical Unit Conversion
Convert between Kilometer and Astronomical Unit quickly and accurately.
How to Convert Kilometer to Astronomical Unit
Conversion Formula
Example
Convert 15 km to AU:
Unit Information
Learn about the length units you're converting between
Kilometer
km
Definition
A Kilometer is a unit of Length in the metric system, equal to one thousand of the base unit. It is used for large-scale measurements and everyday use and provides precise measurements for applications requiring kilometer scale accuracy.
History/Origin
The Kilometer was introduced as part of the metric system with the prefix "kilo-" derived from Greek or Latin roots. It became important for measurements requiring large-scale measurements and everyday use and provides a standardized unit for kilometer scale applications.
Current Use
The Kilometer is used in scientific research, industry, and technology for large-scale measurements and everyday use. It provides precise measurements for applications requiring thousand-scale accuracy and is essential for kilometer scale measurements in various fields.
Multiplier
1000
Offset
0
Astronomical Unit
AU
Definition
An astronomical unit (symbol: AU) is a unit of length used in astronomy, equal to the average distance between Earth and the Sun. It is approximately 149.6 million kilometers (93 million miles). The AU is the standard unit for measuring distances within the solar system.
History/Origin
The astronomical unit was first estimated by ancient astronomers using observations of planetary positions. The modern value was determined through radar measurements of Venus and Mercury in the 1960s. It was redefined in 2012 to be exactly 149,597,870,700 meters.
Current Use
The astronomical unit is used throughout astronomy for measuring distances within the solar system, planetary orbits, and spacecraft trajectories. It is essential for space mission planning, planetary science, and understanding the scale of our solar system.
Multiplier
149597870691
Offset
0
Kilometer to Astronomical Unit Conversion Table
| Kilometer [km] | Astronomical Unit [AU] |
|---|---|
| 1 km | 7E-9 AU |
| 10 km | 7E-8 AU |
| 25 km | 2E-7 AU |
| 50 km | 3E-7 AU |
| 100 km | 7E-7 AU |
| 0 km | 0E+0 AU |
| -10 km | -7E-8 AU |
| -40 km | -3E-7 AU |
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