light-day | 1 ly | 2 ly | 3 ly | 4 ly | 5 ly | 6 ly | 7 ly | 8 ly | 9 ly | 10 ly | 11 ly | 12 ly | 13 ly | 14 ly | 15 ly | 16 ly | 17 ly | 18 ly | 19 ly | 20 ly | 21 ly | 22 ly | 23 ly | 24 ly | 25 ly | 26 ly | 27 ly | 28 ly | 29 ly | 30 ly | 31 ly | 32 ly | 33 ly | 34 ly | 35 ly | 36 ly | 37 ly | 38 ly | 39 ly | 40 ly | 41 ly | 42 ly | 43 ly | 44 ly | 45 ly | 46 ly | 47 ly | 48 ly | 49 ly | 50 ly | 51 ly | 52 ly | 53 ly | 54 ly | 55 ly | 56 ly | 57 ly | 58 ly | 59 ly | 60 ly | 61 ly | 62 ly | 63 ly | 64 ly | 65 ly | 66 ly | 67 ly | 68 ly | 69 ly | 70 ly | 71 ly | 72 ly | 73 ly | 74 ly | 75 ly | 76 ly | 77 ly | 78 ly | 79 ly | 80 ly | 81 ly | 82 ly | 83 ly | 84 ly | 85 ly | 86 ly | 87 ly | 88 ly | 89 ly | 90 ly | 91 ly | 92 ly | 93 ly | 94 ly | 95 ly | 96 ly | 97 ly | 98 ly | 99 ly | 100 ly |
league (land) | 5,364,968,593.8691 lea | 10,729,937,187.738 lea | 16,094,905,781.607 lea | 21,459,874,375.476 lea | 26,824,842,969.345 lea | 32,189,811,563.215 lea | 37,554,780,157.084 lea | 42,919,748,750.953 lea | 48,284,717,344.822 lea | 53,649,685,938.691 lea | 59,014,654,532.56 lea | 64,379,623,126.429 lea | 69,744,591,720.298 lea | 75,109,560,314.167 lea | 80,474,528,908.036 lea | 85,839,497,501.906 lea | 91,204,466,095.775 lea | 96,569,434,689.644 lea | 101,934,403,283.51 lea | 107,299,371,877.38 lea | 112,664,340,471.25 lea | 118,029,309,065.12 lea | 123,394,277,658.99 lea | 128,759,246,252.86 lea | 134,124,214,846.73 lea | 139,489,183,440.6 lea | 144,854,152,034.47 lea | 150,219,120,628.33 lea | 155,584,089,222.2 lea | 160,949,057,816.07 lea | 166,314,026,409.94 lea | 171,678,995,003.81 lea | 177,043,963,597.68 lea | 182,408,932,191.55 lea | 187,773,900,785.42 lea | 193,138,869,379.29 lea | 198,503,837,973.16 lea | 203,868,806,567.03 lea | 209,233,775,160.89 lea | 214,598,743,754.76 lea | 219,963,712,348.63 lea | 225,328,680,942.5 lea | 230,693,649,536.37 lea | 236,058,618,130.24 lea | 241,423,586,724.11 lea | 246,788,555,317.98 lea | 252,153,523,911.85 lea | 257,518,492,505.72 lea | 262,883,461,099.59 lea | 268,248,429,693.45 lea | 273,613,398,287.32 lea | 278,978,366,881.19 lea | 284,343,335,475.06 lea | 289,708,304,068.93 lea | 295,073,272,662.8 lea | 300,438,241,256.67 lea | 305,803,209,850.54 lea | 311,168,178,444.41 lea | 316,533,147,038.28 lea | 321,898,115,632.15 lea | 327,263,084,226.01 lea | 332,628,052,819.88 lea | 337,993,021,413.75 lea | 343,357,990,007.62 lea | 348,722,958,601.49 lea | 354,087,927,195.36 lea | 359,452,895,789.23 lea | 364,817,864,383.1 lea | 370,182,832,976.97 lea | 375,547,801,570.84 lea | 380,912,770,164.71 lea | 386,277,738,758.57 lea | 391,642,707,352.44 lea | 397,007,675,946.31 lea | 402,372,644,540.18 lea | 407,737,613,134.05 lea | 413,102,581,727.92 lea | 418,467,550,321.79 lea | 423,832,518,915.66 lea | 429,197,487,509.53 lea | 434,562,456,103.4 lea | 439,927,424,697.27 lea | 445,292,393,291.14 lea | 450 657 361 885 lea | 456,022,330,478.87 lea | 461,387,299,072.74 lea | 466,752,267,666.61 lea | 472,117,236,260.48 lea | 477,482,204,854.35 lea | 482,847,173,448.22 lea | 488,212,142,042.09 lea | 493,577,110,635.96 lea | 498,942,079,229.83 lea | 504,307,047,823.7 lea | 509,672,016,417.56 lea | 515,036,985,011.43 lea | 520,401,953,605.3 lea | 525,766,922,199.17 lea | 531,131,890,793.04 lea | 536,496,859,386.91 lea |
The light-day is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in oneday, and is equal to exactly 2.59020683712×1013 metres.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
light-day | ly | ≡ 24 light-hours | ≡ 2.59020683712×1013 m | Science - Astronomy (Length) |
light-days | leagues (land) | light-days | leagues (land) |
---|---|---|---|
1 | = 5364968593.8691 | 4 | = 21459874375.476 |
1.5 | = 8047452890.8036 | 4.5 | = 24142358672.411 |
2 | = 10729937187.738 | 5 | = 26824842969.345 |
2.5 | = 13412421484.673 | 5.5 | = 29507327266.28 |
3 | = 16094905781.607 | 6 | = 32189811563.215 |
A league is a unit of length (or, in various regions, area). It was common in Europe and Latin America, but is no longer an official unit in any nation. The word originally meant the distance a person could walk in an hour. Since the Middle Ages, many values have been specified in several countries.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
league (land) | lea | ≈ 1 hour walk, Currently defined in US as 3 Statute miles, but historically varied from 2 to 9 km | ≈ 4828 m | Imperial/US |
leagues (land) | light-days | leagues (land) | light-days |
---|---|---|---|
1 | = 1.8639438097415E-10 | 4 | = 7.4557752389661E-10 |
1.5 | = 2.7959157146123E-10 | 4.5 | = 8.3877471438369E-10 |
2 | = 3.7278876194831E-10 | 5 | = 9.3197190487076E-10 |
2.5 | = 4.6598595243538E-10 | 5.5 | = 1.0251690953578E-9 |
3 | = 5.5918314292246E-10 | 6 | = 1.1183662858449E-9 |
light-days | leagues (land) |
---|---|
1 | = 5,364,968,593.8691 |
1.8639438097415 × 10-10 | = 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |