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 |
x unit | 1.359461221737 × 1039 xu | 2.7189224434739 × 1039 xu | 4.0783836652109 × 1039 xu | 5.4378448869478 × 1039 xu | 6.7973061086848 × 1039 xu | 8.1567673304217 × 1039 xu | 9.5162285521587 × 1039 xu | 1.0875689773896 × 1040 xu | 1.2235150995633 × 1040 xu | 1.359461221737 × 1040 xu | 1.4954073439106 × 1040 xu | 1.6313534660843 × 1040 xu | 1.767299588258 × 1040 xu | 1.9032457104317 × 1040 xu | 2.0391918326054 × 1040 xu | 2.1751379547791 × 1040 xu | 2.3110840769528 × 1040 xu | 2.4470301991265 × 1040 xu | 2.5829763213002 × 1040 xu | 2.7189224434739 × 1040 xu | 2.8548685656476 × 1040 xu | 2.9908146878213 × 1040 xu | 3.126760809995 × 1040 xu | 3.2627069321687 × 1040 xu | 3.3986530543424 × 1040 xu | 3.5345991765161 × 1040 xu | 3.6705452986898 × 1040 xu | 3.8064914208635 × 1040 xu | 3.9424375430372 × 1040 xu | 4.0783836652109 × 1040 xu | 4.2143297873846 × 1040 xu | 4.3502759095582 × 1040 xu | 4.4862220317319 × 1040 xu | 4.6221681539056 × 1040 xu | 4.7581142760793 × 1040 xu | 4.894060398253 × 1040 xu | 5.0300065204267 × 1040 xu | 5.1659526426004 × 1040 xu | 5.3018987647741 × 1040 xu | 5.4378448869478 × 1040 xu | 5.5737910091215 × 1040 xu | 5.7097371312952 × 1040 xu | 5.8456832534689 × 1040 xu | 5.9816293756426 × 1040 xu | 6.1175754978163 × 1040 xu | 6.25352161999 × 1040 xu | 6.3894677421637 × 1040 xu | 6.5254138643374 × 1040 xu | 6.6613599865111 × 1040 xu | 6.7973061086848 × 1040 xu | 6.9332522308585 × 1040 xu | 7.0691983530322 × 1040 xu | 7.2051444752058 × 1040 xu | 7.3410905973795 × 1040 xu | 7.4770367195532 × 1040 xu | 7.6129828417269 × 1040 xu | 7.7489289639006 × 1040 xu | 7.8848750860743 × 1040 xu | 8.020821208248 × 1040 xu | 8.1567673304217 × 1040 xu | 8.2927134525954 × 1040 xu | 8.4286595747691 × 1040 xu | 8.5646056969428 × 1040 xu | 8.7005518191165 × 1040 xu | 8.8364979412902 × 1040 xu | 8.9724440634639 × 1040 xu | 9.1083901856376 × 1040 xu | 9.2443363078113 × 1040 xu | 9.380282429985 × 1040 xu | 9.5162285521587 × 1040 xu | 9.6521746743324 × 1040 xu | 9.7881207965061 × 1040 xu | 9.9240669186798 × 1040 xu | 1.0060013040853 × 1041 xu | 1.0195959163027 × 1041 xu | 1.0331905285201 × 1041 xu | 1.0467851407375 × 1041 xu | 1.0603797529548 × 1041 xu | 1.0739743651722 × 1041 xu | 1.0875689773896 × 1041 xu | 1.1011635896069 × 1041 xu | 1.1147582018243 × 1041 xu | 1.1283528140417 × 1041 xu | 1.141947426259 × 1041 xu | 1.1555420384764 × 1041 xu | 1.1691366506938 × 1041 xu | 1.1827312629111 × 1041 xu | 1.1963258751285 × 1041 xu | 1.2099204873459 × 1041 xu | 1.2235150995633 × 1041 xu | 1.2371097117806 × 1041 xu | 1.250704323998 × 1041 xu | 1.2642989362154 × 1041 xu | 1.2778935484327 × 1041 xu | 1.2914881606501 × 1041 xu | 1.3050827728675 × 1041 xu | 1.3186773850848 × 1041 xu | 1.3322719973022 × 1041 xu | 1.3458666095196 × 1041 xu | 1.359461221737 × 1041 xu |
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 | x units | Hubble length | x units |
---|---|---|---|
1 | ≈ 1.359461221737E+39 | 4 | ≈ 5.4378448869478E+39 |
1.5 | ≈ 2.0391918326054E+39 | 4.5 | ≈ 6.1175754978163E+39 |
2 | ≈ 2.7189224434739E+39 | 5 | ≈ 6.7973061086848E+39 |
2.5 | ≈ 3.3986530543424E+39 | 5.5 | ≈ 7.4770367195532E+39 |
3 | ≈ 4.0783836652109E+39 | 6 | ≈ 8.1567673304217E+39 |
The x unit (symbol xu) is a unit of length approximately equal to 0.1 pm (10−13 m). It is used to quote the wavelength of X-rays and gamma rays.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
x unit | xu | ≈ 1.0021×10−13 m | ≈ 1.0021×10−13 m | Metric system Non-SI |
x units | Hubble length | x units | Hubble length |
---|---|---|---|
1 | ≈ 7.3558552756828E-40 | 4 | ≈ 2.9423421102731E-39 |
1.5 | ≈ 1.1033782913524E-39 | 4.5 | ≈ 3.3101348740573E-39 |
2 | ≈ 1.4711710551366E-39 | 5 | ≈ 3.6779276378414E-39 |
2.5 | ≈ 1.8389638189207E-39 | 5.5 | ≈ 4.0457204016256E-39 |
3 | ≈ 2.2067565827049E-39 | 6 | ≈ 4.4135131654097E-39 |
Hubble length | x units |
---|---|
1 | ≈ 1.359461221737 × 1039 |
7.3558552756828 × 10-40 | ≈ 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 …) |