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the claim
The Hubble parameter changes as a function of the age of the universe
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
3 sources for · 0 against

Observational cosmology and cosmic chronometer studies confirm that the Hubble parameter varies as a function of redshift, which directly corresponds to the age and expansion history of the universe.

Evidence for · 3
Improved constraints on the expansion rate of the Universe up to z ∼ 1.1 from the spectroscopic evolution of cosmic chronometers
2012 · cited by 938
Paper [0] measures the Hubble parameter H(z) across various redshifts corresponding to different cosmic ages, confirming its evolution.
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The analysis

The retrieved papers consistently treat the Hubble parameter as a function of redshift H(z), which maps directly to look-back time and the age of the universe. Multiple studies (such as [0], [1], and [2]) explicitly measure and analyze how H changes over cosmic time. There are no papers refuting this well-established cosmological principle.

More for · 2
Setting the Stage for Cosmic Chronometers. I. Assessing the Impact of Young Stellar Populations on Hubble Parameter Measurements
2018 · cited by 110
Paper [1] discusses measuring the Hubble parameter as a function of redshift (which directly corresponds to the age of the universe) using cosmic chronometers.
Constraining the expansion rate of the Universe using low-redshift ellipticals as cosmic chronometers
2010 · cited by 59
Paper [2] uses early-type galaxies to determine the expansion history of the universe and extract H(z) at different epochs.
The paper trail · every fact has a biography
first checked04 Aug 2026
judged → SUPPORTED · 9404 Aug 2026
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