How to convert light years to atomic units of length
1 light year is equal to 1.787818953 × 10²⁶ atomic units of length, and 1 a.u. of length is equal to 5.593407533 × 10⁻²⁷ light years. To convert, multiply by the conversion factor:
atomic units of length = light years × 1.787818953 × 10²⁶
atomic units of length = light years ÷ 5.593407533 × 10⁻²⁷Example: convert 1 ly to a₀: 1 × 1.787818953 × 10²⁶ = 1.787818953 × 10²⁶ a₀.
Light Year to A.u. of Length conversion table
| Light Year (ly) | A.u. of Length (a₀) |
|---|---|
| 0.01 ly | 1.787818953 × 10²⁴ a₀ |
| 0.1 ly | 1.787818953 × 10²⁵ a₀ |
| 1 ly | 1.787818953 × 10²⁶ a₀ |
| 2 ly | 3.575637906 × 10²⁶ a₀ |
| 3 ly | 5.36345686 × 10²⁶ a₀ |
| 5 ly | 8.939094766 × 10²⁶ a₀ |
| 10 ly | 1.787818953 × 10²⁷ a₀ |
| 20 ly | 3.575637906 × 10²⁷ a₀ |
| 50 ly | 8.939094766 × 10²⁷ a₀ |
| 100 ly | 1.787818953 × 10²⁸ a₀ |
| 250 ly | 4.469547383 × 10²⁸ a₀ |
| 500 ly | 8.939094766 × 10²⁸ a₀ |
| 1,000 ly | 1.787818953 × 10²⁹ a₀ |
About the light year
A light-year is the distance light travels in a vacuum in one Julian year (365.25 days): about 9.46 trillion km. The nearest star system, Alpha Centauri, is about 4.37 light-years away.
Symbol: ly · 1 ly = 9.460730473 × 10¹⁵ m · Category: Astronomical
About the a.u. of length
The atomic unit of length is the Bohr radius, about 5.29 × 10⁻¹¹ m: the most probable distance between the proton and electron in a hydrogen atom.
Symbol: a₀ · 1 a₀ = 5.291772109 × 10⁻¹¹ m · Category: Atomic & physics