A 6-meter HWO could measure H0 to 1% with 96 Cepheid-calibrated galaxies, eliminating Type Ia supernovae from the distance ladder.
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Envisioning the Distance Ladder in the Era of the Habitable Worlds Observatory
A 6-meter HWO could measure H0 to 1% with 96 Cepheid-calibrated galaxies, eliminating Type Ia supernovae from the distance ladder.