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 |
chain | 4.7027905003367 × 1014 ch | 9.4055810006735 × 1014 ch | 1.410837150101 × 1015 ch | 1.8811162001347 × 1015 ch | 2.3513952501684 × 1015 ch | 2.821674300202 × 1015 ch | 3.2919533502357 × 1015 ch | 3.7622324002694 × 1015 ch | 4.2325114503031 × 1015 ch | 4.7027905003367 × 1015 ch | 5.1730695503704 × 1015 ch | 5.6433486004041 × 1015 ch | 6.1136276504378 × 1015 ch | 6.5839067004714 × 1015 ch | 7.0541857505051 × 1015 ch | 7.5244648005388 × 1015 ch | 7.9947438505724 × 1015 ch | 8.4650229006061 × 1015 ch | 8.9353019506398 × 1015 ch | 9.4055810006735 × 1015 ch | 9.8758600507071 × 1015 ch | 1.0346139100741 × 1016 ch | 1.0816418150774 × 1016 ch | 1.1286697200808 × 1016 ch | 1.1756976250842 × 1016 ch | 1.2227255300876 × 1016 ch | 1.2697534350909 × 1016 ch | 1.3167813400943 × 1016 ch | 1.3638092450977 × 1016 ch | 1.410837150101 × 1016 ch | 1.4578650551044 × 1016 ch | 1.5048929601078 × 1016 ch | 1.5519208651111 × 1016 ch | 1.5989487701145 × 1016 ch | 1.6459766751179 × 1016 ch | 1.6930045801212 × 1016 ch | 1.7400324851246 × 1016 ch | 1.787060390128 × 1016 ch | 1.8340882951313 × 1016 ch | 1.8811162001347 × 1016 ch | 1.9281441051381 × 1016 ch | 1.9751720101414 × 1016 ch | 2.0221999151448 × 1016 ch | 2.0692278201482 × 1016 ch | 2.1162557251515 × 1016 ch | 2.1632836301549 × 1016 ch | 2.2103115351583 × 1016 ch | 2.2573394401616 × 1016 ch | 2.304367345165 × 1016 ch | 2.3513952501684 × 1016 ch | 2.3984231551717 × 1016 ch | 2.4454510601751 × 1016 ch | 2.4924789651785 × 1016 ch | 2.5395068701818 × 1016 ch | 2.5865347751852 × 1016 ch | 2.6335626801886 × 1016 ch | 2.6805905851919 × 1016 ch | 2.7276184901953 × 1016 ch | 2.7746463951987 × 1016 ch | 2.821674300202 × 1016 ch | 2.8687022052054 × 1016 ch | 2.9157301102088 × 1016 ch | 2.9627580152121 × 1016 ch | 3.0097859202155 × 1016 ch | 3.0568138252189 × 1016 ch | 3.1038417302222 × 1016 ch | 3.1508696352256 × 1016 ch | 3.197897540229 × 1016 ch | 3.2449254452323 × 1016 ch | 3.2919533502357 × 1016 ch | 3.3389812552391 × 1016 ch | 3.3860091602424 × 1016 ch | 3.4330370652458 × 1016 ch | 3.4800649702492 × 1016 ch | 3.5270928752525 × 1016 ch | 3.5741207802559 × 1016 ch | 3.6211486852593 × 1016 ch | 3.6681765902627 × 1016 ch | 3.715204495266 × 1016 ch | 3.7622324002694 × 1016 ch | 3.8092603052728 × 1016 ch | 3.8562882102761 × 1016 ch | 3.9033161152795 × 1016 ch | 3.9503440202829 × 1016 ch | 3.9973719252862 × 1016 ch | 4.0443998302896 × 1016 ch | 4.091427735293 × 1016 ch | 4.1384556402963 × 1016 ch | 4.1854835452997 × 1016 ch | 4.2325114503031 × 1016 ch | 4.2795393553064 × 1016 ch | 4.3265672603098 × 1016 ch | 4.3735951653132 × 1016 ch | 4.4206230703165 × 1016 ch | 4.4676509753199 × 1016 ch | 4.5146788803233 × 1016 ch | 4.5617067853266 × 1016 ch | 4.60873469033 × 1016 ch | 4.6557625953334 × 1016 ch | 4.7027905003367 × 1016 ch |
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 | chains | light-years | chains |
---|---|---|---|
1 | ≈ 4.7027905003367E+14 | 4 | ≈ 1.8811162001347E+15 |
1.5 | ≈ 7.0541857505051E+14 | 4.5 | ≈ 2.1162557251515E+15 |
2 | ≈ 9.4055810006735E+14 | 5 | ≈ 2.3513952501684E+15 |
2.5 | ≈ 1.1756976250842E+15 | 5.5 | ≈ 2.5865347751852E+15 |
3 | ≈ 1.410837150101E+15 | 6 | ≈ 2.821674300202E+15 |
A chain is a unit of length. It measures 66 feet, or 22 yards, or 100 links, or 4 rods (20.1168 m). There are 10 chains in a furlong, and 80 chains in one statute mile. An acre is the area of 10 square chains (that is, an area of one chain by one furlong). The chain has been used for several centuries in Britain and in some other countries influenced by British practice.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
chain | ch | ≡ 66 ft (US) ≡ 4 rods | ≈ 20.11684 m | Imperial/US |
chains | light-years | chains | light-years |
---|---|---|---|
1 | ≈ 2.1263970826011E-15 | 4 | ≈ 8.5055883304042E-15 |
1.5 | ≈ 3.1895956239016E-15 | 4.5 | ≈ 9.5687868717048E-15 |
2 | ≈ 4.2527941652021E-15 | 5 | ≈ 1.0631985413005E-14 |
2.5 | ≈ 5.3159927065026E-15 | 5.5 | ≈ 1.1695183954306E-14 |
3 | ≈ 6.3791912478032E-15 | 6 | ≈ 1.2758382495606E-14 |
light-years | chains |
---|---|
1 | ≈ 4.7027905003367 × 1014 |
2.1263970826011 × 10-15 | ≈ 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 …) |