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 |
petameter | 9.4605284 Pm | 18.9210568 Pm | 28.3815852 Pm | 37.8421136 Pm | 47.3026420 Pm | 56.7631704 Pm | 66.2236988 Pm | 75.6842272 Pm | 85.1447556 Pm | 94.6052840 Pm | 104.0658125 Pm | 113.5263409 Pm | 122.9868693 Pm | 132.4473977 Pm | 141.9079261 Pm | 151.3684545 Pm | 160.8289829 Pm | 170.2895113 Pm | 179.7500397 Pm | 189.2105681 Pm | 198.6710965 Pm | 208.1316249 Pm | 217.5921533 Pm | 227.0526817 Pm | 236.5132101 Pm | 245.9737385 Pm | 255.4342669 Pm | 264.8947953 Pm | 274.3553237 Pm | 283.8158521 Pm | 293.2763806 Pm | 302.7369090 Pm | 312.1974374 Pm | 321.6579658 Pm | 331.1184942 Pm | 340.5790226 Pm | 350.0395510 Pm | 359.5000794 Pm | 368.9606078 Pm | 378.4211362 Pm | 387.8816646 Pm | 397.3421930 Pm | 406.8027214 Pm | 416.2632498 Pm | 425.7237782 Pm | 435.1843066 Pm | 444.6448350 Pm | 454.1053634 Pm | 463.5658918 Pm | 473.0264202 Pm | 482.4869486 Pm | 491.9474771 Pm | 501.4080055 Pm | 510.8685339 Pm | 520.3290623 Pm | 529.7895907 Pm | 539.2501191 Pm | 548.7106475 Pm | 558.1711759 Pm | 567.6317043 Pm | 577.0922327 Pm | 586.5527611 Pm | 596.0132895 Pm | 605.4738179 Pm | 614.9343463 Pm | 624.3948747 Pm | 633.8554031 Pm | 643.3159315 Pm | 652.7764599 Pm | 662.2369883 Pm | 671.6975167 Pm | 681.1580452 Pm | 690.6185736 Pm | 700.0791020 Pm | 709.5396304 Pm | 719.0001588 Pm | 728.4606872 Pm | 737.9212156 Pm | 747.3817440 Pm | 756.8422724 Pm | 766.3028008 Pm | 775.7633292 Pm | 785.2238576 Pm | 794.6843860 Pm | 804.1449144 Pm | 813.6054428 Pm | 823.0659712 Pm | 832.5264996 Pm | 841.9870280 Pm | 851.4475564 Pm | 860.9080848 Pm | 870.3686132 Pm | 879.8291417 Pm | 889.2896701 Pm | 898.7501985 Pm | 908.2107269 Pm | 917.6712553 Pm | 927.1317837 Pm | 936.5923121 Pm | 946.0528405 Pm |
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 | petameters | light-years | petameters |
---|---|---|---|
1 | = 9.4605284048794 | 4 | = 37.842113619518 |
1.5 | = 14.190792607319 | 4.5 | = 42.572377821957 |
2 | = 18.921056809759 | 5 | = 47.302642024397 |
2.5 | = 23.651321012199 | 5.5 | = 52.032906226837 |
3 | = 28.381585214638 | 6 | = 56.763170429276 |
Petameter or petametre is equal to 1015 meters (unit of length), comes from a combination of the metric prefix peta (P) and the SI unit of length meter (m). Plural name is petameters.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
petameter | Pm | ≡ 1×1015 m | ≡ 1×1015 m | Metric system SI |
petameters | light-years | petameters | light-years |
---|---|---|---|
1 | = 0.10570234105362 | 4 | = 0.42280936421447 |
1.5 | = 0.15855351158043 | 4.5 | = 0.47566053474128 |
2 | = 0.21140468210724 | 5 | = 0.52851170526809 |
2.5 | = 0.26425585263404 | 5.5 | = 0.5813628757949 |
3 | = 0.31710702316085 | 6 | = 0.63421404632171 |
light-years | petameters |
---|---|
1 | = 9.4605284 |
0.1057023 | = 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 …) |