Numerical Value
| SI units | |
|---|---|
| 9.4607×1012 km | 9.4607×1015 m |
| Astronomical units | |
| 63.241×103 AU | 0.3066 pc |
| US customary / Imperial units | |
| 5.8786×1012 mi | 31.039×1015 ft |
1 light-year = 9460730472580800 metres (exactly)
-
-
- ≈ 5878625 million miles
- ≈ 63241.1 astronomical units
- ≈ 0.306601 parsecs
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The figures above are based on a Julian year (not Gregorian year) of exactly 365.25 days (each of exactly 86400 SI seconds, totalling 31557600 seconds) and a defined speed of light of 299792458 m/s, both included in the IAU (1976) System of Astronomical Constants, used since 1984.
Read more about this topic: MLY
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