light-year | 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) | 1,959,512,925,617.1 lea | 3,919,025,851,234.2 lea | 5,878,538,776,851.3 lea | 7,838,051,702,468.4 lea | 9,797,564,628,085.5 lea | 11 757 077 553 703 lea | 13 716 590 479 320 lea | 15 676 103 404 937 lea | 17 635 616 330 554 lea | 19 595 129 256 171 lea | 21 554 642 181 788 lea | 23 514 155 107 405 lea | 25 473 668 033 022 lea | 27 433 180 958 640 lea | 29 392 693 884 257 lea | 31 352 206 809 874 lea | 33 311 719 735 491 lea | 35 271 232 661 108 lea | 37 230 745 586 725 lea | 39 190 258 512 342 lea | 41 149 771 437 959 lea | 43 109 284 363 576 lea | 45 068 797 289 194 lea | 47 028 310 214 811 lea | 48 987 823 140 428 lea | 50 947 336 066 045 lea | 52 906 848 991 662 lea | 54 866 361 917 279 lea | 56 825 874 842 896 lea | 58 785 387 768 513 lea | 60 744 900 694 130 lea | 62 704 413 619 747 lea | 64 663 926 545 365 lea | 66 623 439 470 982 lea | 68 582 952 396 599 lea | 70 542 465 322 216 lea | 72 501 978 247 833 lea | 74 461 491 173 450 lea | 76 421 004 099 067 lea | 78 380 517 024 684 lea | 80 340 029 950 301 lea | 82 299 542 875 919 lea | 84 259 055 801 536 lea | 86 218 568 727 153 lea | 88 178 081 652 770 lea | 90 137 594 578 387 lea | 92 097 107 504 004 lea | 94 056 620 429 621 lea | 96 016 133 355 238 lea | 97 975 646 280 855 lea | 99 935 159 206 473 lea | 1.0189467213209 × 1014 lea | 1.0385418505771 × 1014 lea | 1.0581369798332 × 1014 lea | 1.0777321090894 × 1014 lea | 1.0973272383456 × 1014 lea | 1.1169223676018 × 1014 lea | 1.1365174968579 × 1014 lea | 1.1561126261141 × 1014 lea | 1.1757077553703 × 1014 lea | 1.1953028846264 × 1014 lea | 1.2148980138826 × 1014 lea | 1.2344931431388 × 1014 lea | 1.2540882723949 × 1014 lea | 1.2736834016511 × 1014 lea | 1.2932785309073 × 1014 lea | 1.3128736601635 × 1014 lea | 1.3324687894196 × 1014 lea | 1.3520639186758 × 1014 lea | 1.371659047932 × 1014 lea | 1.3912541771881 × 1014 lea | 1.4108493064443 × 1014 lea | 1.4304444357005 × 1014 lea | 1.4500395649567 × 1014 lea | 1.4696346942128 × 1014 lea | 1.489229823469 × 1014 lea | 1.5088249527252 × 1014 lea | 1.5284200819813 × 1014 lea | 1.5480152112375 × 1014 lea | 1.5676103404937 × 1014 lea | 1.5872054697499 × 1014 lea | 1.606800599006 × 1014 lea | 1.6263957282622 × 1014 lea | 1.6459908575184 × 1014 lea | 1.6655859867745 × 1014 lea | 1.6851811160307 × 1014 lea | 1.7047762452869 × 1014 lea | 1.7243713745431 × 1014 lea | 1.7439665037992 × 1014 lea | 1.7635616330554 × 1014 lea | 1.7831567623116 × 1014 lea | 1.8027518915677 × 1014 lea | 1.8223470208239 × 1014 lea | 1.8419421500801 × 1014 lea | 1.8615372793363 × 1014 lea | 1.8811324085924 × 1014 lea | 1.9007275378486 × 1014 lea | 1.9203226671048 × 1014 lea | 1.9399177963609 × 1014 lea | 1.9595129256171 × 1014 lea |
The light-year is a unit of length used to express astronomical distances. It is about 9.5 quadrillion metres or 5.9 trillion miles. As defined by the International Astronomical Union (IAU), a light-year is the distance that light travels in vacuum in one Julian year (365.25 days). Because it includes the word "year", the term light-year is sometimes misinterpreted as a unit of time.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
light-year | ly | ≡ Distance light travels in vacuum in 365.25 days | = 9.4607304725808×1015 m | Science - Astronomy (Length) |
light-years | leagues (land) | light-years | leagues (land) |
---|---|---|---|
1 | = 1959512925617.1 | 4 | = 7838051702468.4 |
1.5 | = 2939269388425.7 | 4.5 | = 8817808165277 |
2 | = 3919025851234.2 | 5 | = 9797564628085.5 |
2.5 | = 4898782314042.8 | 5.5 | = 10777321090894 |
3 | = 5878538776851.3 | 6 | = 11757077553703 |
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-years | leagues (land) | light-years |
---|---|---|---|
1 | = 5.1033090260687E-13 | 4 | = 2.0413236104275E-12 |
1.5 | = 7.654963539103E-13 | 4.5 | = 2.2964890617309E-12 |
2 | = 1.0206618052137E-12 | 5 | = 2.5516545130343E-12 |
2.5 | = 1.2758272565172E-12 | 5.5 | = 2.8068199643378E-12 |
3 | = 1.5309927078206E-12 | 6 | = 3.0619854156412E-12 |
light-years | leagues (land) |
---|---|
1 | = 1,959,512,925,617.1 |
5.1033090260687 × 10-13 | = 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 …) |