hubble length | 1 hubble length | 2 hubble length | 3 hubble length | 4 hubble length | 5 hubble length | 6 hubble length | 7 hubble length | 8 hubble length | 9 hubble length | 10 hubble length | 11 hubble length | 12 hubble length | 13 hubble length | 14 hubble length | 15 hubble length | 16 hubble length | 17 hubble length | 18 hubble length | 19 hubble length | 20 hubble length | 21 hubble length | 22 hubble length | 23 hubble length | 24 hubble length | 25 hubble length | 26 hubble length | 27 hubble length | 28 hubble length | 29 hubble length | 30 hubble length | 31 hubble length | 32 hubble length | 33 hubble length | 34 hubble length | 35 hubble length | 36 hubble length | 37 hubble length | 38 hubble length | 39 hubble length | 40 hubble length | 41 hubble length | 42 hubble length | 43 hubble length | 44 hubble length | 45 hubble length | 46 hubble length | 47 hubble length | 48 hubble length | 49 hubble length | 50 hubble length | 51 hubble length | 52 hubble length | 53 hubble length | 54 hubble length | 55 hubble length | 56 hubble length | 57 hubble length | 58 hubble length | 59 hubble length | 60 hubble length | 61 hubble length | 62 hubble length | 63 hubble length | 64 hubble length | 65 hubble length | 66 hubble length | 67 hubble length | 68 hubble length | 69 hubble length | 70 hubble length | 71 hubble length | 72 hubble length | 73 hubble length | 74 hubble length | 75 hubble length | 76 hubble length | 77 hubble length | 78 hubble length | 79 hubble length | 80 hubble length | 81 hubble length | 82 hubble length | 83 hubble length | 84 hubble length | 85 hubble length | 86 hubble length | 87 hubble length | 88 hubble length | 89 hubble length | 90 hubble length | 91 hubble length | 92 hubble length | 93 hubble length | 94 hubble length | 95 hubble length | 96 hubble length | 97 hubble length | 98 hubble length | 99 hubble length | 100 hubble length |
light-second | 4.5441973403567 × 1017 light-second | 9.0883946807134 × 1017 light-second | 1.363259202107 × 1018 light-second | 1.8176789361427 × 1018 light-second | 2.2720986701784 × 1018 light-second | 2.726518404214 × 1018 light-second | 3.1809381382497 × 1018 light-second | 3.6353578722854 × 1018 light-second | 4.089777606321 × 1018 light-second | 4.5441973403567 × 1018 light-second | 4.9986170743924 × 1018 light-second | 5.453036808428 × 1018 light-second | 5.9074565424637 × 1018 light-second | 6.3618762764994 × 1018 light-second | 6.8162960105351 × 1018 light-second | 7.2707157445707 × 1018 light-second | 7.7251354786064 × 1018 light-second | 8.1795552126421 × 1018 light-second | 8.6339749466777 × 1018 light-second | 9.0883946807134 × 1018 light-second | 9.5428144147491 × 1018 light-second | 9.9972341487848 × 1018 light-second | 1.045165388282 × 1019 light-second | 1.0906073616856 × 1019 light-second | 1.1360493350892 × 1019 light-second | 1.1814913084927 × 1019 light-second | 1.2269332818963 × 1019 light-second | 1.2723752552999 × 1019 light-second | 1.3178172287034 × 1019 light-second | 1.363259202107 × 1019 light-second | 1.4087011755106 × 1019 light-second | 1.4541431489141 × 1019 light-second | 1.4995851223177 × 1019 light-second | 1.5450270957213 × 1019 light-second | 1.5904690691248 × 1019 light-second | 1.6359110425284 × 1019 light-second | 1.681353015932 × 1019 light-second | 1.7267949893355 × 1019 light-second | 1.7722369627391 × 1019 light-second | 1.8176789361427 × 1019 light-second | 1.8631209095462 × 1019 light-second | 1.9085628829498 × 1019 light-second | 1.9540048563534 × 1019 light-second | 1.999446829757 × 1019 light-second | 2.0448888031605 × 1019 light-second | 2.0903307765641 × 1019 light-second | 2.1357727499677 × 1019 light-second | 2.1812147233712 × 1019 light-second | 2.2266566967748 × 1019 light-second | 2.2720986701784 × 1019 light-second | 2.3175406435819 × 1019 light-second | 2.3629826169855 × 1019 light-second | 2.4084245903891 × 1019 light-second | 2.4538665637926 × 1019 light-second | 2.4993085371962 × 1019 light-second | 2.5447505105998 × 1019 light-second | 2.5901924840033 × 1019 light-second | 2.6356344574069 × 1019 light-second | 2.6810764308105 × 1019 light-second | 2.726518404214 × 1019 light-second | 2.7719603776176 × 1019 light-second | 2.8174023510212 × 1019 light-second | 2.8628443244247 × 1019 light-second | 2.9082862978283 × 1019 light-second | 2.9537282712319 × 1019 light-second | 2.9991702446354 × 1019 light-second | 3.044612218039 × 1019 light-second | 3.0900541914426 × 1019 light-second | 3.1354961648461 × 1019 light-second | 3.1809381382497 × 1019 light-second | 3.2263801116533 × 1019 light-second | 3.2718220850568 × 1019 light-second | 3.3172640584604 × 1019 light-second | 3.362706031864 × 1019 light-second | 3.4081480052675 × 1019 light-second | 3.4535899786711 × 1019 light-second | 3.4990319520747 × 1019 light-second | 3.5444739254782 × 1019 light-second | 3.5899158988818 × 1019 light-second | 3.6353578722854 × 1019 light-second | 3.6807998456889 × 1019 light-second | 3.7262418190925 × 1019 light-second | 3.7716837924961 × 1019 light-second | 3.8171257658996 × 1019 light-second | 3.8625677393032 × 1019 light-second | 3.9080097127068 × 1019 light-second | 3.9534516861103 × 1019 light-second | 3.9988936595139 × 1019 light-second | 4.0443356329175 × 1019 light-second | 4.089777606321 × 1019 light-second | 4.1352195797246 × 1019 light-second | 4.1806615531282 × 1019 light-second | 4.2261035265317 × 1019 light-second | 4.2715454999353 × 1019 light-second | 4.3169874733389 × 1019 light-second | 4.3624294467424 × 1019 light-second | 4.407871420146 × 1019 light-second | 4.4533133935496 × 1019 light-second | 4.4987553669531 × 1019 light-second | 4.5441973403567 × 1019 light-second |
The Hubble length or Hubble distance is a unit of distance in cosmology, defined as cH0−1 — the speed of light multiplied by the Hubble time. It is equivalent to 4,550 million parsecs or 14.4 billion light years. (The numerical value of the Hubble length in light years is, by definition, equal to that of the Hubble time in years.) The Hubble distance would be the distance between the Earth and the galaxies which are currently receding from us at the speed of light, as can be seen by substituting D = c/H0 into the equation for Hubble's law, v = H0D.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
hubble length | ≈ 14.4 billion light-years ≈ 4.55 gigaparsecs | ≈ 1.3623160903026E+26 m | Science - Astronomy (Length) |
Hubble length | light-seconds | Hubble length | light-seconds |
---|---|---|---|
1 | ≈ 4.5441973403567E+17 | 4 | ≈ 1.8176789361427E+18 |
1.5 | ≈ 6.8162960105351E+17 | 4.5 | ≈ 2.0448888031605E+18 |
2 | ≈ 9.0883946807134E+17 | 5 | ≈ 2.2720986701784E+18 |
2.5 | ≈ 1.1360493350892E+18 | 5.5 | ≈ 2.4993085371962E+18 |
3 | ≈ 1.363259202107E+18 | 6 | ≈ 2.726518404214E+18 |
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).
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
light-second | ≡ Distance light travels in one second in vacuum | ≡ 299 792 458 m | Science - Astronomy (Length) |
light-seconds | Hubble length | light-seconds | Hubble length |
---|---|---|---|
1 | ≈ 2.2006086556124E-18 | 4 | ≈ 8.8024346224498E-18 |
1.5 | ≈ 3.3009129834187E-18 | 4.5 | ≈ 9.902738950256E-18 |
2 | ≈ 4.4012173112249E-18 | 5 | ≈ 1.1003043278062E-17 |
2.5 | ≈ 5.5015216390311E-18 | 5.5 | ≈ 1.2103347605868E-17 |
3 | ≈ 6.6018259668373E-18 | 6 | ≈ 1.3203651933675E-17 |
Hubble length | light-seconds |
---|---|
1 | ≈ 4.5441973403567 × 1017 |
2.2006086556124 × 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 …) |