"Hubble's law#Hubble length" . "Hubble's constant" . . "expansion" . "determining the rate of expansion of the universe" . "Hubble constant (H₀) tension" . "speeds that are proportional to their distance from the observer" . . "Hubble's law" . "Hubble flow" . "Hubble's law#Hubble tension" . "local expansion of the Universe" . "Hubble's law" . "Hubble's law#Hubble time" . . "Hubble's law#Dimensionless Hubble constant" . "universal expansion" . . "measure the expansion rate" . . "Hubble length" . "precise and regular form of the universe's expansion" . . "universe's expansion" . . . "deviations \u2013 which have earlier been described to indicate a \\\"crisis of cosmology\\\" by others \u2013 of the normalization parameter A, or the Hubble constant H0" . "Hubble-Lema\u00EEtre law" . "H₀" . "discovery" . . "expansion of the Universe" . "velocity\u2013distance relation" . . "Hubble parameter" . "Universe is expanding" . "constrain the value" . "galaxies are flying away" . "cosmological red shift" . "relate these redshifts to velocity" . "red shift observations" . "Hubble\u2013Lema\u00EEtre's law" . . "different speeds" . . "cosmological redshift" . "Hubble rate" . "Hubble time" . "redshift and distance" . . "rate of expansion of the universe" . "Hubble Constant" . . "Hubble's law#Hubble diagram" . "Hubble's Law" . "linear relationship between distance to galaxies and their recessional velocity" . "expand outward" . "redshift-distance relationship" . "numerical value of its redshift" . "previous calculation" . "z" . . . "Hubble constant" . "redshift" . "observations" .