earth radius | 1 R⊕ | 2 R⊕ | 3 R⊕ | 4 R⊕ | 5 R⊕ | 6 R⊕ | 7 R⊕ | 8 R⊕ | 9 R⊕ | 10 R⊕ | 11 R⊕ | 12 R⊕ | 13 R⊕ | 14 R⊕ | 15 R⊕ | 16 R⊕ | 17 R⊕ | 18 R⊕ | 19 R⊕ | 20 R⊕ | 21 R⊕ | 22 R⊕ | 23 R⊕ | 24 R⊕ | 25 R⊕ | 26 R⊕ | 27 R⊕ | 28 R⊕ | 29 R⊕ | 30 R⊕ | 31 R⊕ | 32 R⊕ | 33 R⊕ | 34 R⊕ | 35 R⊕ | 36 R⊕ | 37 R⊕ | 38 R⊕ | 39 R⊕ | 40 R⊕ | 41 R⊕ | 42 R⊕ | 43 R⊕ | 44 R⊕ | 45 R⊕ | 46 R⊕ | 47 R⊕ | 48 R⊕ | 49 R⊕ | 50 R⊕ | 51 R⊕ | 52 R⊕ | 53 R⊕ | 54 R⊕ | 55 R⊕ | 56 R⊕ | 57 R⊕ | 58 R⊕ | 59 R⊕ | 60 R⊕ | 61 R⊕ | 62 R⊕ | 63 R⊕ | 64 R⊕ | 65 R⊕ | 66 R⊕ | 67 R⊕ | 68 R⊕ | 69 R⊕ | 70 R⊕ | 71 R⊕ | 72 R⊕ | 73 R⊕ | 74 R⊕ | 75 R⊕ | 76 R⊕ | 77 R⊕ | 78 R⊕ | 79 R⊕ | 80 R⊕ | 81 R⊕ | 82 R⊕ | 83 R⊕ | 84 R⊕ | 85 R⊕ | 86 R⊕ | 87 R⊕ | 88 R⊕ | 89 R⊕ | 90 R⊕ | 91 R⊕ | 92 R⊕ | 93 R⊕ | 94 R⊕ | 95 R⊕ | 96 R⊕ | 97 R⊕ | 98 R⊕ | 99 R⊕ | 100 R⊕ |
spat | 6.371 × 10-6 S | 1.2742 × 10-5 S | 1.9113 × 10-5 S | 2.5484 × 10-5 S | 3.1855 × 10-5 S | 3.8226 × 10-5 S | 4.4597 × 10-5 S | 5.0968 × 10-5 S | 5.7339 × 10-5 S | 6.371 × 10-5 S | 7.0081 × 10-5 S | 7.6452 × 10-5 S | 8.2823 × 10-5 S | 8.9194 × 10-5 S | 9.5565 × 10-5 S | 0.0001019 S | 0.0001083 S | 0.0001147 S | 0.0001210 S | 0.0001274 S | 0.0001338 S | 0.0001402 S | 0.0001465 S | 0.0001529 S | 0.0001593 S | 0.0001656 S | 0.0001720 S | 0.0001784 S | 0.0001848 S | 0.0001911 S | 0.0001975 S | 0.0002039 S | 0.0002102 S | 0.0002166 S | 0.0002230 S | 0.0002294 S | 0.0002357 S | 0.0002421 S | 0.0002485 S | 0.0002548 S | 0.0002612 S | 0.0002676 S | 0.0002740 S | 0.0002803 S | 0.0002867 S | 0.0002931 S | 0.0002994 S | 0.0003058 S | 0.0003122 S | 0.0003186 S | 0.0003249 S | 0.0003313 S | 0.0003377 S | 0.0003440 S | 0.0003504 S | 0.0003568 S | 0.0003631 S | 0.0003695 S | 0.0003759 S | 0.0003823 S | 0.0003886 S | 0.0003950 S | 0.0004014 S | 0.0004077 S | 0.0004141 S | 0.0004205 S | 0.0004269 S | 0.0004332 S | 0.0004396 S | 0.0004460 S | 0.0004523 S | 0.0004587 S | 0.0004651 S | 0.0004715 S | 0.0004778 S | 0.0004842 S | 0.0004906 S | 0.0004969 S | 0.0005033 S | 0.0005097 S | 0.0005161 S | 0.0005224 S | 0.0005288 S | 0.0005352 S | 0.0005415 S | 0.0005479 S | 0.0005543 S | 0.0005606 S | 0.0005670 S | 0.0005734 S | 0.0005798 S | 0.0005861 S | 0.0005925 S | 0.0005989 S | 0.0006052 S | 0.0006116 S | 0.0006180 S | 0.0006244 S | 0.0006307 S | 0.0006371 S |
Earth radius is the distance from Earth's center to its surface, about 6,371 km (3,959 mi). This length is also used as a unit of distance, especially in astronomy and geology, where it is usually denoted by R⊕.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
earth radius | R⊕ | ≈ 6,371 km | ≈ 6,371 km | Science - Astronomy (Length) |
earth radius | spats | earth radius | spats |
---|---|---|---|
1 | ≈ 6.371E-6 | 4 | ≈ 2.5484E-5 |
1.5 | ≈ 9.5565E-6 | 4.5 | ≈ 2.86695E-5 |
2 | ≈ 1.2742E-5 | 5 | ≈ 3.1855E-5 |
2.5 | ≈ 1.59275E-5 | 5.5 | ≈ 3.50405E-5 |
3 | ≈ 1.9113E-5 | 6 | ≈ 3.8226E-5 |
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 | earth radius | spats | earth radius |
---|---|---|---|
1 | ≈ 156961.23057605 | 4 | ≈ 627844.92230419 |
1.5 | ≈ 235441.84586407 | 4.5 | ≈ 706325.53759221 |
2 | ≈ 313922.4611521 | 5 | ≈ 784806.15288024 |
2.5 | ≈ 392403.07644012 | 5.5 | ≈ 863286.76816826 |
3 | ≈ 470883.69172814 | 6 | ≈ 941767.38345629 |
earth radius | spats |
---|---|
1 | ≈ 6.371 × 10-6 |
156,961.2305761 | ≈ 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 …) |