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A lightyear is the distance that light travels in one year. Since there are various definitions for the length of a year, there are correspondingly slightly different values for a lightyear. One lightyear corresponds to about 9.461e15 m, 5.879e12 mi, or 63239.7 AU, or 0.3066 pc.
The parsec is a unit of length equivalent to around 20 trillion (20,000,000,000,000) miles, 31 trillion kilometres, or 206,264 times the distance from the earth to the sun.
A parsec is also equivalent to approximately 3.26 light years (the journey distance if you travelled at the speed of light for three years and three months).
| -20.000ly | -6.1320pc |
| -19.000ly | -5.8254pc |
| -18.000ly | -5.5188pc |
| -17.000ly | -5.2122pc |
| -16.000ly | -4.9056pc |
| -15.000ly | -4.5990pc |
| -14.000ly | -4.2924pc |
| -13.000ly | -3.9858pc |
| -12.000ly | -3.6792pc |
| -11.000ly | -3.3726pc |
| -10.000ly | -3.0660pc |
| -9.0000ly | -2.7594pc |
| -8.0000ly | -2.4528pc |
| -7.0000ly | -2.1462pc |
| -6.0000ly | -1.8396pc |
| -5.0000ly | -1.5330pc |
| -4.0000ly | -1.2264pc |
| -3.0000ly | -0.91980pc |
| -2.0000ly | -0.61320pc |
| -1.0000ly | -0.30660pc |
| Lightyears | Parsecs |
|---|---|
| 0.0000ly | 0.0000pc |
| 1.0000ly | 0.30660pc |
| 2.0000ly | 0.61320pc |
| 3.0000ly | 0.91980pc |
| 4.0000ly | 1.2264pc |
| 5.0000ly | 1.5330pc |
| 6.0000ly | 1.8396pc |
| 7.0000ly | 2.1462pc |
| 8.0000ly | 2.4528pc |
| 9.0000ly | 2.7594pc |
| 10.000ly | 3.0660pc |
| 11.000ly | 3.3726pc |
| 12.000ly | 3.6792pc |
| 13.000ly | 3.9858pc |
| 14.000ly | 4.2924pc |
| 15.000ly | 4.5990pc |
| 16.000ly | 4.9056pc |
| 17.000ly | 5.2122pc |
| 18.000ly | 5.5188pc |
| 19.000ly | 5.8254pc |
| Lightyears | Parsecs |
|---|---|
| 20.000ly | 6.1320pc |
| 21.000ly | 6.4386pc |
| 22.000ly | 6.7452pc |
| 23.000ly | 7.0518pc |
| 24.000ly | 7.3584pc |
| 25.000ly | 7.6650pc |
| 26.000ly | 7.9716pc |
| 27.000ly | 8.2782pc |
| 28.000ly | 8.5848pc |
| 29.000ly | 8.8914pc |
| 30.000ly | 9.1980pc |
| 31.000ly | 9.5046pc |
| 32.000ly | 9.8112pc |
| 33.000ly | 10.118pc |
| 34.000ly | 10.424pc |
| 35.000ly | 10.731pc |
| 36.000ly | 11.038pc |
| 37.000ly | 11.344pc |
| 38.000ly | 11.651pc |
| 39.000ly | 11.957pc |
| Lightyears | Parsecs |
|---|---|
| 40.000ly | 12.264pc |
| 41.000ly | 12.571pc |
| 42.000ly | 12.877pc |
| 43.000ly | 13.184pc |
| 44.000ly | 13.490pc |
| 45.000ly | 13.797pc |
| 46.000ly | 14.104pc |
| 47.000ly | 14.410pc |
| 48.000ly | 14.717pc |
| 49.000ly | 15.023pc |
| 50.000ly | 15.330pc |
| 51.000ly | 15.637pc |
| 52.000ly | 15.943pc |
| 53.000ly | 16.250pc |
| 54.000ly | 16.556pc |
| 55.000ly | 16.863pc |
| 56.000ly | 17.170pc |
| 57.000ly | 17.476pc |
| 58.000ly | 17.783pc |
| 59.000ly | 18.089pc |
| 60.000ly | 18.396pc |
| 61.000ly | 18.703pc |
| 62.000ly | 19.009pc |
| 63.000ly | 19.316pc |
| 64.000ly | 19.622pc |
| 65.000ly | 19.929pc |
| 66.000ly | 20.236pc |
| 67.000ly | 20.542pc |
| 68.000ly | 20.849pc |
| 69.000ly | 21.155pc |
| 70.000ly | 21.462pc |
| 71.000ly | 21.769pc |
| 72.000ly | 22.075pc |
| 73.000ly | 22.382pc |
| 74.000ly | 22.689pc |
| 75.000ly | 22.995pc |
| 76.000ly | 23.302pc |
| 77.000ly | 23.608pc |
| 78.000ly | 23.915pc |
| 79.000ly | 24.222pc |