Hubble's Law

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Edwin Hubble (1889–1953)

Hubble's Law states that the recessional velocity (v) of objects in the universe is proportional to its distance (D) from us.
v=H₀D

1 Derivation And Interpretation
2 Mistakes
3 Distance
4 Energy Conservation
5 References
6 See Also

Derivation And Interpretation

This formula is derived by plotting the measured redshift of Extra-Galactic-Nebula against its distance. The linearity of the plot is used to prove that the universe is expanding.

Mistakes

There are several mistakes in the derivation.

Distance

If astronomers do not know how to calculate the distance of far-away objects in the universe, this plot is meaningless. For example Hubble had assumed that the Large Magellanic Cloud was at a distance of 0.034 Mega Parsecs. (refer Table 1 of PNAS Vol 15, 1929 pg 169). Based on the light echo from SN1987a, the distance of the Large Magellanic Cloud is less than 5000 light years. (refer An Alternate View of SN1987A)

Energy Conservation

We know that if you throw a ball upwards, it will slow down. As potential energy increases due to galaxies moving away from us, their velocity referenced to ours must decrease. But Hubble's states otherwise.