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A light-year (abbreviation: ly), sometimes referred to incorrectly as a light year, is a unit of length used informally to express astronomical distances. It is approxi ..more definition+
In relation to the base unit of [length] => (meters), 1 Light Years (ly) is equal to 9461000000000000 meters, while 1 Varas [Argentina] (vr[Argentina]) = 0.866 meters.| 21 Light Years | to common length units |
|---|---|
| 21 ly | = 198681000000000000 meters (m) |
| 21 ly | = 198681000000000 kilometers (km) |
| 21 ly | = 1.98681E+19 centimeters (cm) |
| 21 ly | = 6.518405511811E+17 feet (ft) |
| 21 ly | = 7.8220866141732E+18 inches (in) |
| 21 ly | = 2.1728018372703E+17 yards (yd) |
| 21 ly | = 1.2345464984491E+14 miles (mi) |
| 21 ly | = 21 light years (ly) |
| 21 ly | = 7.5092040956478E+20 pixels (PX) |
| 21 ly | = 1.24175625E+52 planck length (pl) |