天文单位转换器
使用此天文单位转换器快速进行精确的单位换算。
AU
公里
149,597,870.7 km
Miles92,955,807.3 mi
Light-Minutes8.3167 light-min
Kilometres vs Distance
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.
计算示例
Jupiter orbits at about 5.2 AU.
- 01km = 5.2 × 149 597 870.7 ≈ 778 million km
- 02Light-minutes = 5.2 × 8.317 = 43.2
- 03Light takes about 43 minutes to reach Jupiter from the Sun.
常见问题
How was the AU originally measured?
Through transits of Venus and radar ranging. Since 2012 the IAU defines it as exactly 149 597 870 700 m.
How many AU to the nearest star?
Proxima Centauri is about 268 000 AU away.
What is 1 AU in light-time?
Light takes 499.0 seconds (8 min 19 s) to travel 1 AU.