CORDIS Project
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The H1PStars project aims to achieve a precise measurement of Hubble's constant by addressing biases and uncertainties in current methods. It focuses on enhancing the understanding of classical Cepheid stars to improve the cosmic distance ladder, which is crucial for accurate cosmological measurements.
What's up with Hubble's constant (H0)?
Recent H0 measurements have shown that the Universe is expanding faster than cosmology predicts, indicating a possible cosmological crisis.
To wit, H0 measured to 1.9% precision in today's Universe using a cosmic distance ladder composed of classical Cepheids and type-Ia supernovae differs by 8.9% (4.2 sigma) from H0 predicted by cosmology based on observations of the Cosmic Microwave Background emitted 13.8 billion years ago.
However, it remains unclear wh…
ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE
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