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April 2020
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41 Reads
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4 Citations
The Physics Teacher
Two well-regarded measurements for the expansion rate of the universe disagree, leaving cosmologists very puzzled. It may be that something large has been overlooked in our theory of the Big Bang. This discrepancy is called the Hubble tension and it has led to a very interesting conversation within the cosmology community.
... The value of the Hubble's constant from measurements resulting from examining the anisotropies of CMB is 67.3±1.2 (km/s)/Mpc, while the result from optical observations made by the HST is 72±8 (km/s)/Mpc [2,3,6]. These disagreements among different measurements for the value of the Hubble's constant is causing a "cosmological crisis", as described by Don Lincoln [12]. ...
April 2020
The Physics Teacher
