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A hypothesis once used to explain the Hubble relation is the "tired light hypothesis." The tired...
The Hubble Parameter
The constant describing the rate of this recession, called the
Hubble parameterHubble parameterA measure of the rate of expansion
of the universe, which is the average value of the velocity of
recession divided by distance: about 70 km/s/megaparsec. Hubble
parameter A measure of the rate of expansion of the universe, which
is the average value of the velocity of recession divided by
distance: about 70 km/s/megaparsec. , is used to determine the age
and size of the...