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Solar system measurements and the local Hubble tension.

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Title: Solar system measurements and the local Hubble tension.
Authors: King, Leslie A. les@king.myzen.co.uk
Source: Physics Essays. Mar2026, Vol. 39 Issue 1, p49-52. 4p.
Subjects: Solar system, Hubble constant, Cosmic background radiation, Expanding universe, Type I supernovae, Astrophysics, Hubble, Edwin Powell, 1889-1953
Abstract (English): The existing astrophysical paradigm asserts that cosmological expansion does not operate on gravitationally bound bodies. However, there is now considerable evidence that such expansion does occur within the Solar System. Seven quantitative estimates of "local" expansion phenomena suggest that H0, the mean (±σ) current value of the Hubble-Lemaître parameter, is (49 ± 11) (km/s)/Mpc. That is far lower than has been derived from analysis of the cosmic background radiation, i.e., H0 = (67.4 ± 0.5) (km/s)/Mpc or the luminosity of type Ia supernovae, i.e., (73.04 ± 1.04) (km/s)/Mpc. Furthermore, there are several other situations within the Solar System where precise values are less readily obtained, but there is some suggestion that H0 might also have a lower value. These findings, when considered alongside the large-scale "Hubble tension," may support the suggestion that H0 may be scale-dependent, although the physical origin of that effect is unclear. [ABSTRACT FROM AUTHOR]
Abstract (French): Le paradigme astrophysique actuel affirme que l'expansion cosmologique n'opère pas sur les corps liés par la gravité. Cependant, il existe désormais de nombreuses preuves que cette expansion se produit également au sein du Système solaire. Sept estimations quantitatives des phénomènes d'expansion 'locale' suggèrent que Ho, la valeur moyenne actuelle (±0) du paramètre de Hubble-Lemaître, est de (49±11) (km/s)/Mpc. Cela est bien inférieur aux valeurs dérivées de l'analyse du rayonnement de fond cosmique, soit Ho(67.4±0.5) (km/s)/Mpc, ou de la lumi-nosité des supernovae de type la, soit (73.04±1.04) (km/s)/Mpc. De plus, il existe plusieurs autres situations au sein du Système solaire, où des valeurs précises sont moins facilement obtenues, mais il semble que Ho pourrait également y être plus faible. Ces résultats, lorsqu'ils sont considérés en parallèle avec la 'tension de Hubble' à grande échelle, peuvent soutenir l'hypothèse selon laquelle Ho pourrait dépendre de l'échelle, bien que l'origine physique de cet effet reste incertaine. [ABSTRACT FROM AUTHOR]
Copyright of Physics Essays is the property of Physics Essays Publication and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Solar system measurements and the local Hubble tension.
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  Data: <searchLink fieldCode="AR" term="%22King%2C+Leslie+A%2E%22">King, Leslie A.</searchLink><i> les@king.myzen.co.uk</i>
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  Data: <searchLink fieldCode="DE" term="%22Solar+system%22">Solar system</searchLink><br /><searchLink fieldCode="DE" term="%22Hubble+constant%22">Hubble constant</searchLink><br /><searchLink fieldCode="DE" term="%22Cosmic+background+radiation%22">Cosmic background radiation</searchLink><br /><searchLink fieldCode="DE" term="%22Expanding+universe%22">Expanding universe</searchLink><br /><searchLink fieldCode="DE" term="%22Type+I+supernovae%22">Type I supernovae</searchLink><br /><searchLink fieldCode="DE" term="%22Astrophysics%22">Astrophysics</searchLink><br /><searchLink fieldCode="DE" term="%22Hubble%2C+Edwin+Powell%2C+1889-1953%22">Hubble, Edwin Powell, 1889-1953</searchLink>
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  Label: Abstract (English)
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  Data: The existing astrophysical paradigm asserts that cosmological expansion does not operate on gravitationally bound bodies. However, there is now considerable evidence that such expansion does occur within the Solar System. Seven quantitative estimates of "local" expansion phenomena suggest that H0, the mean (±σ) current value of the Hubble-Lemaître parameter, is (49 ± 11) (km/s)/Mpc. That is far lower than has been derived from analysis of the cosmic background radiation, i.e., H0 = (67.4 ± 0.5) (km/s)/Mpc or the luminosity of type Ia supernovae, i.e., (73.04 ± 1.04) (km/s)/Mpc. Furthermore, there are several other situations within the Solar System where precise values are less readily obtained, but there is some suggestion that H0 might also have a lower value. These findings, when considered alongside the large-scale "Hubble tension," may support the suggestion that H0 may be scale-dependent, although the physical origin of that effect is unclear. [ABSTRACT FROM AUTHOR]
– Name: Abstract
  Label: Abstract (French)
  Group: Ab
  Data: Le paradigme astrophysique actuel affirme que l'expansion cosmologique n'opère pas sur les corps liés par la gravité. Cependant, il existe désormais de nombreuses preuves que cette expansion se produit également au sein du Système solaire. Sept estimations quantitatives des phénomènes d'expansion 'locale' suggèrent que Ho, la valeur moyenne actuelle (±0) du paramètre de Hubble-Lemaître, est de (49±11) (km/s)/Mpc. Cela est bien inférieur aux valeurs dérivées de l'analyse du rayonnement de fond cosmique, soit Ho(67.4±0.5) (km/s)/Mpc, ou de la lumi-nosité des supernovae de type la, soit (73.04±1.04) (km/s)/Mpc. De plus, il existe plusieurs autres situations au sein du Système solaire, où des valeurs précises sont moins facilement obtenues, mais il semble que Ho pourrait également y être plus faible. Ces résultats, lorsqu'ils sont considérés en parallèle avec la 'tension de Hubble' à grande échelle, peuvent soutenir l'hypothèse selon laquelle Ho pourrait dépendre de l'échelle, bien que l'origine physique de cet effet reste incertaine. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Physics Essays is the property of Physics Essays Publication and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.4006/0836-1398-39.1.049
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      – Code: eng
        Text: English
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        PageCount: 4
        StartPage: 49
    Subjects:
      – SubjectFull: Solar system
        Type: general
      – SubjectFull: Hubble constant
        Type: general
      – SubjectFull: Cosmic background radiation
        Type: general
      – SubjectFull: Expanding universe
        Type: general
      – SubjectFull: Type I supernovae
        Type: general
      – SubjectFull: Astrophysics
        Type: general
      – SubjectFull: Hubble, Edwin Powell, 1889-1953
        Type: general
    Titles:
      – TitleFull: Solar system measurements and the local Hubble tension.
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              M: 03
              Text: Mar2026
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              Y: 2026
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