spat | 1 S | 2 S | 3 S | 4 S | 5 S | 6 S | 7 S | 8 S | 9 S | 10 S | 11 S | 12 S | 13 S | 14 S | 15 S | 16 S | 17 S | 18 S | 19 S | 20 S | 21 S | 22 S | 23 S | 24 S | 25 S | 26 S | 27 S | 28 S | 29 S | 30 S | 31 S | 32 S | 33 S | 34 S | 35 S | 36 S | 37 S | 38 S | 39 S | 40 S | 41 S | 42 S | 43 S | 44 S | 45 S | 46 S | 47 S | 48 S | 49 S | 50 S | 51 S | 52 S | 53 S | 54 S | 55 S | 56 S | 57 S | 58 S | 59 S | 60 S | 61 S | 62 S | 63 S | 64 S | 65 S | 66 S | 67 S | 68 S | 69 S | 70 S | 71 S | 72 S | 73 S | 74 S | 75 S | 76 S | 77 S | 78 S | 79 S | 80 S | 81 S | 82 S | 83 S | 84 S | 85 S | 86 S | 87 S | 88 S | 89 S | 90 S | 91 S | 92 S | 93 S | 94 S | 95 S | 96 S | 97 S | 98 S | 99 S | 100 S |
light-year | 0.0001057 ly | 0.0002114 ly | 0.0003171 ly | 0.0004228 ly | 0.0005285 ly | 0.0006342 ly | 0.0007399 ly | 0.0008456 ly | 0.0009513 ly | 0.0010570 ly | 0.0011627 ly | 0.0012684 ly | 0.0013741 ly | 0.0014798 ly | 0.0015855 ly | 0.0016912 ly | 0.0017969 ly | 0.0019026 ly | 0.0020083 ly | 0.0021140 ly | 0.0022197 ly | 0.0023255 ly | 0.0024312 ly | 0.0025369 ly | 0.0026426 ly | 0.0027483 ly | 0.0028540 ly | 0.0029597 ly | 0.0030654 ly | 0.0031711 ly | 0.0032768 ly | 0.0033825 ly | 0.0034882 ly | 0.0035939 ly | 0.0036996 ly | 0.0038053 ly | 0.0039110 ly | 0.0040167 ly | 0.0041224 ly | 0.0042281 ly | 0.0043338 ly | 0.0044395 ly | 0.0045452 ly | 0.0046509 ly | 0.0047566 ly | 0.0048623 ly | 0.0049680 ly | 0.0050737 ly | 0.0051794 ly | 0.0052851 ly | 0.0053908 ly | 0.0054965 ly | 0.0056022 ly | 0.0057079 ly | 0.0058136 ly | 0.0059193 ly | 0.0060250 ly | 0.0061307 ly | 0.0062364 ly | 0.0063421 ly | 0.0064478 ly | 0.0065535 ly | 0.0066592 ly | 0.0067649 ly | 0.0068707 ly | 0.0069764 ly | 0.0070821 ly | 0.0071878 ly | 0.0072935 ly | 0.0073992 ly | 0.0075049 ly | 0.0076106 ly | 0.0077163 ly | 0.0078220 ly | 0.0079277 ly | 0.0080334 ly | 0.0081391 ly | 0.0082448 ly | 0.0083505 ly | 0.0084562 ly | 0.0085619 ly | 0.0086676 ly | 0.0087733 ly | 0.0088790 ly | 0.0089847 ly | 0.0090904 ly | 0.0091961 ly | 0.0093018 ly | 0.0094075 ly | 0.0095132 ly | 0.0096189 ly | 0.0097246 ly | 0.0098303 ly | 0.0099360 ly | 0.0100417 ly | 0.0101474 ly | 0.0102531 ly | 0.0103588 ly | 0.0104645 ly | 0.0105702 ly |
The spat (symbol S) is also an obsolete unit of distance used in astronomy. It is equal to 1000000000 kilometres (1 Tm or 1012 m). It is about 6.6846 astronomical units (AU), 1.057×10−4 light-years or3.240×10−5 parsecs.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
spat | S | ≡ 1×1012 m | ≡ 1×1012 m | Science - Astronomy (Length) |
spats | light-years | spats | light-years |
---|---|---|---|
1 | = 0.00010570234105362 | 4 | = 0.00042280936421447 |
1.5 | = 0.00015855351158043 | 4.5 | = 0.00047566053474128 |
2 | = 0.00021140468210724 | 5 | = 0.00052851170526809 |
2.5 | = 0.00026425585263404 | 5.5 | = 0.0005813628757949 |
3 | = 0.00031710702316085 | 6 | = 0.00063421404632171 |
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 | spats | light-years | spats |
---|---|---|---|
1 | = 9460.5284048794 | 4 | = 37842.113619518 |
1.5 | = 14190.792607319 | 4.5 | = 42572.377821957 |
2 | = 18921.056809759 | 5 | = 47302.642024397 |
2.5 | = 23651.321012198 | 5.5 | = 52032.906226837 |
3 | = 28381.585214638 | 6 | = 56763.170429276 |
spats | light-years |
---|---|
1 | = 0.0001057 |
9,460.5284049 | = 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 …) |