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Can Cepheid Variables Be Used to Map Dark Energy?
💡 The Answer
- Cepheids anchor the cosmic distance ladder needed to measure dark energy's effect.
- Precise distances to Type Ia supernovae, calibrated with Cepheids, revealed cosmic acceleration.
- The SH0ES project uses Cepheids to reduce uncertainties in the Hubble constant.
- Discrepancies in H₀ might indicate new properties of dark energy.
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