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-day | 5,259,487,662,449.9 ly | 10 518 975 324 900 ly | 15 778 462 987 350 ly | 21 037 950 649 800 ly | 26 297 438 312 249 ly | 31 556 925 974 699 ly | 36 816 413 637 149 ly | 42 075 901 299 599 ly | 47 335 388 962 049 ly | 52 594 876 624 499 ly | 57 854 364 286 949 ly | 63 113 851 949 399 ly | 68 373 339 611 849 ly | 73 632 827 274 298 ly | 78 892 314 936 748 ly | 84 151 802 599 198 ly | 89 411 290 261 648 ly | 94 670 777 924 098 ly | 99 930 265 586 548 ly | 1.05189753249 × 1014 ly | 1.1044924091145 × 1014 ly | 1.157087285739 × 1014 ly | 1.2096821623635 × 1014 ly | 1.262277038988 × 1014 ly | 1.3148719156125 × 1014 ly | 1.367466792237 × 1014 ly | 1.4200616688615 × 1014 ly | 1.472656545486 × 1014 ly | 1.5252514221105 × 1014 ly | 1.577846298735 × 1014 ly | 1.6304411753595 × 1014 ly | 1.683036051984 × 1014 ly | 1.7356309286085 × 1014 ly | 1.788225805233 × 1014 ly | 1.8408206818575 × 1014 ly | 1.893415558482 × 1014 ly | 1.9460104351065 × 1014 ly | 1.998605311731 × 1014 ly | 2.0512001883555 × 1014 ly | 2.10379506498 × 1014 ly | 2.1563899416045 × 1014 ly | 2.208984818229 × 1014 ly | 2.2615796948535 × 1014 ly | 2.314174571478 × 1014 ly | 2.3667694481025 × 1014 ly | 2.419364324727 × 1014 ly | 2.4719592013514 × 1014 ly | 2.5245540779759 × 1014 ly | 2.5771489546004 × 1014 ly | 2.6297438312249 × 1014 ly | 2.6823387078494 × 1014 ly | 2.7349335844739 × 1014 ly | 2.7875284610984 × 1014 ly | 2.8401233377229 × 1014 ly | 2.8927182143474 × 1014 ly | 2.9453130909719 × 1014 ly | 2.9979079675964 × 1014 ly | 3.0505028442209 × 1014 ly | 3.1030977208454 × 1014 ly | 3.1556925974699 × 1014 ly | 3.2082874740944 × 1014 ly | 3.2608823507189 × 1014 ly | 3.3134772273434 × 1014 ly | 3.3660721039679 × 1014 ly | 3.4186669805924 × 1014 ly | 3.4712618572169 × 1014 ly | 3.5238567338414 × 1014 ly | 3.5764516104659 × 1014 ly | 3.6290464870904 × 1014 ly | 3.6816413637149 × 1014 ly | 3.7342362403394 × 1014 ly | 3.7868311169639 × 1014 ly | 3.8394259935884 × 1014 ly | 3.8920208702129 × 1014 ly | 3.9446157468374 × 1014 ly | 3.9972106234619 × 1014 ly | 4.0498055000864 × 1014 ly | 4.1024003767109 × 1014 ly | 4.1549952533354 × 1014 ly | 4.2075901299599 × 1014 ly | 4.2601850065844 × 1014 ly | 4.3127798832089 × 1014 ly | 4.3653747598334 × 1014 ly | 4.4179696364579 × 1014 ly | 4.4705645130824 × 1014 ly | 4.5231593897069 × 1014 ly | 4.5757542663314 × 1014 ly | 4.6283491429559 × 1014 ly | 4.6809440195804 × 1014 ly | 4.7335388962049 × 1014 ly | 4.7861337728294 × 1014 ly | 4.8387286494539 × 1014 ly | 4.8913235260784 × 1014 ly | 4.9439184027029 × 1014 ly | 4.9965132793274 × 1014 ly | 5.0491081559519 × 1014 ly | 5.1017030325764 × 1014 ly | 5.1542979092009 × 1014 ly | 5.2068927858254 × 1014 ly | 5.2594876624499 × 1014 ly |
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-days | Hubble length | light-days |
---|---|---|---|
1 | ≈ 5259487662449.9 | 4 | ≈ 21037950649800 |
1.5 | ≈ 7889231493674.8 | 4.5 | ≈ 23667694481025 |
2 | ≈ 10518975324900 | 5 | ≈ 26297438312249 |
2.5 | ≈ 13148719156125 | 5.5 | ≈ 28927182143474 |
3 | ≈ 15778462987350 | 6 | ≈ 31556925974699 |
The light-day 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 oneday, and is equal to exactly 2.59020683712×1013 metres.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
light-day | ly | ≡ 24 light-hours | ≡ 2.59020683712×1013 m | Science - Astronomy (Length) |
light-days | Hubble length | light-days | Hubble length |
---|---|---|---|
1 | ≈ 1.9013258784491E-13 | 4 | ≈ 7.6053035137966E-13 |
1.5 | ≈ 2.8519888176737E-13 | 4.5 | ≈ 8.5559664530212E-13 |
2 | ≈ 3.8026517568983E-13 | 5 | ≈ 9.5066293922457E-13 |
2.5 | ≈ 4.7533146961229E-13 | 5.5 | ≈ 1.045729233147E-12 |
3 | ≈ 5.7039776353474E-13 | 6 | ≈ 1.1407955270695E-12 |
Hubble length | light-days |
---|---|
1 | ≈ 5,259,487,662,449.9 |
1.9013258784491 × 10-13 | ≈ 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 …) |