Astronomical Unit Converter — 公式
## The Astronomical Unit
**1 AU = 149 597 870.7 km (exact, IAU 2012)**
Light takes about 8.317 minutes to travel 1 AU. The AU is the fundamental baseline for solar system distances.
**1 AU = 149 597 870.7 km (exact, IAU 2012)**
Light takes about 8.317 minutes to travel 1 AU. The AU is the fundamental baseline for solar system distances.
计算示例
Jupiter orbits at about 5.2 AU.
- km = 5.2 × 149 597 870.7 ≈ 778 million km
- Light-minutes = 5.2 × 8.317 = 43.2
- Light takes about 43 minutes to reach Jupiter from the Sun.