ly → pc：输入数值，结果立即显示。
使用以下公式：
pc = ly × 0.3066013938
| 光年 (ly) | 秒差距 (pc) |
|---|---|
| 0.1 ly | 0.0306601 pc |
| 0.25 ly | 0.0766503 pc |
| 0.5 ly | 0.153301 pc |
| 1 ly | 0.306601 pc |
| 2 ly | 0.613203 pc |
| 3 ly | 0.919804 pc |
| 4 ly | 1.22641 pc |
| 5 ly | 1.53301 pc |
| 6 ly | 1.83961 pc |
| 7 ly | 2.14621 pc |
| 8 ly | 2.45281 pc |
| 9 ly | 2.75941 pc |
| 10 ly | 3.06601 pc |
| 12 ly | 3.67922 pc |
| 15 ly | 4.59902 pc |
| 20 ly | 6.13203 pc |
| 25 ly | 7.66503 pc |
| 30 ly | 9.19804 pc |
| 40 ly | 12.2641 pc |
| 50 ly | 15.3301 pc |
| 60 ly | 18.3961 pc |
| 70 ly | 21.4621 pc |
| 75 ly | 22.9951 pc |
| 80 ly | 24.5281 pc |
| 90 ly | 27.5941 pc |
| 100 ly | 30.6601 pc |
| 150 ly | 45.9902 pc |
| 200 ly | 61.3203 pc |
| 250 ly | 76.6503 pc |
| 500 ly | 153.301 pc |
| 1,000 ly | 306.601 pc |
光年（ly）：常用计量单位。1 ly = 9,460,730,473,000 km。
秒差距（pc）：常用计量单位。1 pc = 3.261563777 ly。