Constants & Units · constant
Light-year
ly = 9.460 730 472 5808 × 10¹⁵ m
- Unit
- m
- Value
- 9.460 730 472 5808 × 10¹⁵
- Exact
- yes
- Note
- How far light travels in a Julian year — a unit of distance, despite the name.
- Symbol
- ly
- Category
- Astronomical
- Numeric
- 9460730472580800
- Uncertainty
- exact (365.25 d × c)
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