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Criticism and Comparison of Hubble-Lemaitre Law

This article delves into the criticism and comparison of the Hubble-Lemaitre Law, exploring the distinctions between the linear relation and expansion concepts as presented by Hubble and Lemaitre. Kragh's critical views, Eddington's perspective on expansion, and the relevance of equations and plots in their theories are discussed. Despite the minor distinctions, both scientists' results are based on earlier observations, highlighting the complexities and shortcomings in understanding distance and speed in cosmology.

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Criticism and Comparison of Hubble-Lemaitre Law

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  1. Hubble law  Hubble-Lemaitre law?

  2. Others at the time • xx

  3. Hubble constant prior to 1996 • xx

  4. Hubble constant in recent years • xx

  5. Others at the time • xx

  6. 3 different classes of mechanisms • xx

  7. 3 different classes of mechanisms • xx

  8. 3 different classes of mechanisms • xx

  9. Hubble (1929) V0 = K x D

  10. Lemaitre (1927)

  11. At earlier times

  12. 3 different classes of mechanisms

  13. xx

  14. The criticism • Kragh’s criticism is based on the distinction between the law (v=H*r) and the expansion • Hubble showed that the relation is linear • Lemaitre didn’t have such a plot (but an equation) and focused more on expansion • I found his 2003 with Smith most useful!

  15. Kragh+Smith (2003) • Explains why Kragh is so dismissive • Lemaitre didn’t show a plot

  16. Kragh+Smith (2003) about Hubble • But Hubble didn’t think of expansion!

  17. Eddington (1930) • Focus on expansion • Mentioned Lemaitre in positive light • Hubble not mentioned • But: observations also not

  18. Final comments • In my view, the distinction (linear or not) is minor; his equation (24) gives linear relation • Both results (Hubble 500, Lemaitre 625) are based on earlier observations by Lundmark and Stromberg for radial velocities, and Hubble for apparent magnitudes  distances • Earlier observations in isolation not conclusive regarding distance and speed • Shortcomings both for Hubble (expansion not mentioned) and Lemaitre (no plot) • Both must be acknowledged

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