May 21, 2024

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The “Hubble problem” could deepen with the new measurement of the expansion of the universe

The “Hubble problem” could deepen with the new measurement of the expansion of the universe

Image of Cepheid variable star RS Puppis. (Image credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA) – Hubble/Europe Collaboration)

The most accurate observation yet of distant stars that periodically change in brightness may prompt a rethink of the rate at which the universe is expanding — perhaps by settling, or deepening, a long-standing problem in cosmology.

The observation confirms that there is a discrepancy between the two main methods of measuring velocity Universe Expanding, aligning with one and not the other, a new study reports.

Researchers in the Stellar group used data collected by Europe Jaya spacecraft for study Cepheid variable stars, which pulsates regularly, providing a method for accurately measuring cosmic distances. The technique of measuring Cepheid stars is expanding to include other methods, such as those based on Type 1a observations supernovae.