Hubble-Slipher Constant and the Speed of Light

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There is only the observable Universe.

The Universe is expanding at exactly the velocity of light.

This explains cosmic isotropic as 'c' has always been the same.

The Universe is closed, positively curved and asymptotically flat.

Derivation of the Hubble-Slipher Constant for a Universe age
of 13.8 billion years given a velocity-of-light expansion rate.
Kilometers in a megaparsec: 3.08567758 × 10 ¹⁹
One year = 31,556,926 seconds
Universe at age UAge is t = 13.8 billion years. Assumed.
Universe UAge is t = 31,556,926 × 13.8 × 10⁹ = 4.354855788 × 10¹⁷ seconds
Diameter ct = 299792.458 km/sec × 4.3548557 × 10¹⁷ sec = 1.3055 × 10²³ km
Diameter is ct = 1.305553 × 10²³ / 3.08567758 × 10¹⁹ mega parsecs
Universe Diameter is ct = 4231.009 mega parsecs
Hubble-Slipher Constant is H = c per UD = velocity of light per Universe Diameter
H₀ = 299792.458 km/sec per 4231.009 mega parsec
H₀ = 70.856 km/s per Mega Parsec

Derivation of the Hubble-Slipher Constant for a Universe age
of 14.5 billion years given a velocity-of-light expansion rate.
Kilometers in a megaparsec: 3.08567758 × 10¹⁹
One year = 31,556,926 seconds
Universe at age UAge is t = 14.5 billion years. Assumed.
Universe UAge is t = 31,556,926 × 14.5 × 10⁹ = 4.57575427 × 10¹⁷ seconds
Diameter ct = 299792.458 km/sec × 4.57575427 × 10¹⁷ sec = 1.37177662; 10²³ km
Diameter is ct = 1.37177662 × 10²³ / 3.08567758 × 10¹⁹ mega parsecs
Universe Diameter is ct = 4445.625 mega parsecs
Hubble-Slipher Constant is H = c per UD = velocity of light per Universe Diameter
H₀ = 299792.458 km/sec per 4445.625 mega parsec
H₀ = 67.435 km/s per Mega Parsec