| light-second | 1 light-second | 2 light-second | 3 light-second | 4 light-second | 5 light-second | 6 light-second | 7 light-second | 8 light-second | 9 light-second | 10 light-second | 11 light-second | 12 light-second | 13 light-second | 14 light-second | 15 light-second | 16 light-second | 17 light-second | 18 light-second | 19 light-second | 20 light-second | 21 light-second | 22 light-second | 23 light-second | 24 light-second | 25 light-second | 26 light-second | 27 light-second | 28 light-second | 29 light-second | 30 light-second | 31 light-second | 32 light-second | 33 light-second | 34 light-second | 35 light-second | 36 light-second | 37 light-second | 38 light-second | 39 light-second | 40 light-second | 41 light-second | 42 light-second | 43 light-second | 44 light-second | 45 light-second | 46 light-second | 47 light-second | 48 light-second | 49 light-second | 50 light-second | 51 light-second | 52 light-second | 53 light-second | 54 light-second | 55 light-second | 56 light-second | 57 light-second | 58 light-second | 59 light-second | 60 light-second | 61 light-second | 62 light-second | 63 light-second | 64 light-second | 65 light-second | 66 light-second | 67 light-second | 68 light-second | 69 light-second | 70 light-second | 71 light-second | 72 light-second | 73 light-second | 74 light-second | 75 light-second | 76 light-second | 77 light-second | 78 light-second | 79 light-second | 80 light-second | 81 light-second | 82 light-second | 83 light-second | 84 light-second | 85 light-second | 86 light-second | 87 light-second | 88 light-second | 89 light-second | 90 light-second | 91 light-second | 92 light-second | 93 light-second | 94 light-second | 95 light-second | 96 light-second | 97 light-second | 98 light-second | 99 light-second | 100 light-second |
| astronomical unit | 0.0020040 AU | 0.0040080 AU | 0.0060120 AU | 0.0080160 AU | 0.0100199 AU | 0.0120239 AU | 0.0140279 AU | 0.0160319 AU | 0.0180359 AU | 0.0200399 AU | 0.0220439 AU | 0.0240479 AU | 0.0260519 AU | 0.0280558 AU | 0.0300598 AU | 0.0320638 AU | 0.0340678 AU | 0.0360718 AU | 0.0380758 AU | 0.0400798 AU | 0.0420838 AU | 0.0440878 AU | 0.0460917 AU | 0.0480957 AU | 0.0500997 AU | 0.0521037 AU | 0.0541077 AU | 0.0561117 AU | 0.0581157 AU | 0.0601197 AU | 0.0621237 AU | 0.0641276 AU | 0.0661316 AU | 0.0681356 AU | 0.0701396 AU | 0.0721436 AU | 0.0741476 AU | 0.0761516 AU | 0.0781556 AU | 0.0801596 AU | 0.0821635 AU | 0.0841675 AU | 0.0861715 AU | 0.0881755 AU | 0.0901795 AU | 0.0921835 AU | 0.0941875 AU | 0.0961915 AU | 0.0981955 AU | 0.1001994 AU | 0.1022034 AU | 0.1042074 AU | 0.1062114 AU | 0.1082154 AU | 0.1102194 AU | 0.1122234 AU | 0.1142274 AU | 0.1162314 AU | 0.1182353 AU | 0.1202393 AU | 0.1222433 AU | 0.1242473 AU | 0.1262513 AU | 0.1282553 AU | 0.1302593 AU | 0.1322633 AU | 0.1342672 AU | 0.1362712 AU | 0.1382752 AU | 0.1402792 AU | 0.1422832 AU | 0.1442872 AU | 0.1462912 AU | 0.1482952 AU | 0.1502992 AU | 0.1523031 AU | 0.1543071 AU | 0.1563111 AU | 0.1583151 AU | 0.1603191 AU | 0.1623231 AU | 0.1643271 AU | 0.1663311 AU | 0.1683351 AU | 0.1703390 AU | 0.1723430 AU | 0.1743470 AU | 0.1763510 AU | 0.1783550 AU | 0.1803590 AU | 0.1823630 AU | 0.1843670 AU | 0.1863710 AU | 0.1883749 AU | 0.1903789 AU | 0.1923829 AU | 0.1943869 AU | 0.1963909 AU | 0.1983949 AU | 0.2003989 AU |
The light-second 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 onesecond, and is equal to exactly 299792458 metres (just over 186282 miles).
| 1 light-seconds ≡ 0.0020039888041 astronomical units | 4 light-seconds ≡ 0.0080159552164 astronomical units |
| 1.5 light-seconds ≡ 0.00300598320615 astronomical units | 4.5 light-seconds ≡ 0.00901794961845 astronomical units |
| 2 light-seconds ≡ 0.0040079776082 astronomical units | 5 light-seconds ≡ 0.0100199440205 astronomical units |
| 2.5 light-seconds ≡ 0.00500997201025 astronomical units | 5.5 light-seconds ≡ 0.01102193842255 astronomical units |
| 3 light-seconds ≡ 0.0060119664123 astronomical units | 6 light-seconds ≡ 0.0120239328246 astronomical units |
The astronomical unit (symbol: au or ua) is a unit of length, roughly the distance from Earth to the Sun. However, that distance varies as Earth orbits the Sun, from a maximum (aphelion) to a minimum (perihelion) and back again once a year. Originally conceived as the average of Earth's aphelion and perihelion, it is now defined as exactly 149 597 870 700 metres (about 150 million kilometres, or 93 million miles). The astronomical unit is used primarily as a convenient yardstick for measuring distances within the Solar System or around other stars. However, it is also a fundamental component in the definition of another unit of astronomical length, the parsec.
| 1 astronomical units ≡ 499.00478383616 light-seconds | 4 astronomical units ≡ 1996.0191353446 light-seconds |
| 1.5 astronomical units ≡ 748.50717575423 light-seconds | 4.5 astronomical units ≡ 2245.5215272627 light-seconds |
| 2 astronomical units ≡ 998.00956767231 light-seconds | 5 astronomical units ≡ 2495.0239191808 light-seconds |
| 2.5 astronomical units ≡ 1247.5119595904 light-seconds | 5.5 astronomical units ≡ 2744.5263110989 light-seconds |
| 3 astronomical units ≡ 1497.0143515085 light-seconds | 6 astronomical units ≡ 2994.0287030169 light-seconds |
| 1 light-seconds ≡ 0.0020040 astronomical units |
| 1 astronomical units ≡ 499.0047838 light-seconds |