Equation 17 · Part 1 · From Origins to Frontier: A History of Precision Cosmology
Symbol H_0
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is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
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is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
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…has been rebuilt with three independent stellar calibrators — classical Cepheids, the tip of the red-giant branch, and Mira variables — each anchored by a different absolute-distance technique, and each produces a local well above Planck’s inferred value, though not always identical to SH0ES’s own number. The CMB-based inference has likewise been cross-checked against an entirely separate CMB experiment, the Atacama Cosmology Telescope, and against the South Pole Telescope, both of which recover parameters…
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