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 |
micron | 1.0 × 1018 μm | 2.0 × 1018 μm | 3.0 × 1018 μm | 4.0 × 1018 μm | 5.0 × 1018 μm | 6.0 × 1018 μm | 7.0 × 1018 μm | 8.0 × 1018 μm | 9.0 × 1018 μm | 1.0 × 1019 μm | 1.1 × 1019 μm | 1.2 × 1019 μm | 1.3 × 1019 μm | 1.4 × 1019 μm | 1.5 × 1019 μm | 1.6 × 1019 μm | 1.7 × 1019 μm | 1.8 × 1019 μm | 1.9 × 1019 μm | 2.0 × 1019 μm | 2.1 × 1019 μm | 2.2 × 1019 μm | 2.3 × 1019 μm | 2.4 × 1019 μm | 2.5 × 1019 μm | 2.6 × 1019 μm | 2.7 × 1019 μm | 2.8 × 1019 μm | 2.9 × 1019 μm | 3.0 × 1019 μm | 3.1 × 1019 μm | 3.2 × 1019 μm | 3.3 × 1019 μm | 3.4 × 1019 μm | 3.5 × 1019 μm | 3.6 × 1019 μm | 3.7 × 1019 μm | 3.8 × 1019 μm | 3.9 × 1019 μm | 4.0 × 1019 μm | 4.1 × 1019 μm | 4.2 × 1019 μm | 4.3 × 1019 μm | 4.4 × 1019 μm | 4.5 × 1019 μm | 4.6 × 1019 μm | 4.7 × 1019 μm | 4.8 × 1019 μm | 4.9 × 1019 μm | 5.0 × 1019 μm | 5.1 × 1019 μm | 5.2 × 1019 μm | 5.3 × 1019 μm | 5.4 × 1019 μm | 5.5 × 1019 μm | 5.6 × 1019 μm | 5.7 × 1019 μm | 5.8 × 1019 μm | 5.9 × 1019 μm | 6.0 × 1019 μm | 6.1 × 1019 μm | 6.2 × 1019 μm | 6.3 × 1019 μm | 6.4 × 1019 μm | 6.5 × 1019 μm | 6.6 × 1019 μm | 6.7 × 1019 μm | 6.8 × 1019 μm | 6.9 × 1019 μm | 7.0 × 1019 μm | 7.1 × 1019 μm | 7.2 × 1019 μm | 7.3 × 1019 μm | 7.4 × 1019 μm | 7.5 × 1019 μm | 7.6 × 1019 μm | 7.7 × 1019 μm | 7.8 × 1019 μm | 7.9 × 1019 μm | 8.0 × 1019 μm | 8.1 × 1019 μm | 8.2 × 1019 μm | 8.3 × 1019 μm | 8.4 × 1019 μm | 8.5 × 1019 μm | 8.6 × 1019 μm | 8.7 × 1019 μm | 8.8 × 1019 μm | 8.9 × 1019 μm | 9.0 × 1019 μm | 9.1 × 1019 μm | 9.2 × 1019 μm | 9.3 × 1019 μm | 9.4 × 1019 μm | 9.5 × 1019 μm | 9.6 × 1019 μm | 9.7 × 1019 μm | 9.8 × 1019 μm | 9.9 × 1019 μm | 1.0 × 1020 μm |
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 | micron | spats | micron |
---|---|---|---|
1 | ≡ 1.0E+18 | 4 | ≡ 4.0E+18 |
1.5 | ≡ 1.5E+18 | 4.5 | ≡ 4.5E+18 |
2 | ≡ 2.0E+18 | 5 | ≡ 5.0E+18 |
2.5 | ≡ 2.5E+18 | 5.5 | ≡ 5.5E+18 |
3 | ≡ 3.0E+18 | 6 | ≡ 6.0E+18 |
The micron (SI symbol: μm) or micrometer is an SI derived unit of length equaling 1×10−6 of a metre (SI standard prefix "micro-" = 10−6); that is, one millionth of a metre (or one thousandth of a millimetre, 0.001 mm, or about 0.000039 inch).
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
micron | μm | ≡ 1×10−6 m | ≡ 1×10−6 m | Metric system Non-SI |
micron | spats | micron | spats |
---|---|---|---|
1 | ≡ 1.0E-18 | 4 | ≡ 4.0E-18 |
1.5 | ≡ 1.5E-18 | 4.5 | ≡ 4.5E-18 |
2 | ≡ 2.0E-18 | 5 | ≡ 5.0E-18 |
2.5 | ≡ 2.5E-18 | 5.5 | ≡ 5.5E-18 |
3 | ≡ 3.0E-18 | 6 | ≡ 6.0E-18 |
spats | micron |
---|---|
1 | ≡ 1.0 × 1018 |
1.0 × 10-18 | ≡ 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 …) |