"Hubble's problems" could get worse with a new measurement of the expansion of the universe

“Hubble’s issues” may worsen with a brand new measurement of the enlargement of the universe

A picture of the Cepheid variable star RS Puppis. (Picture credit score: NASA, ESA and Hubble Heritage Staff (STScI/AURA)-Hubble/Europe Collaboration)

Essentially the most correct remark so far of distant stars that periodically change in brightness may set off a rethinking of the speed at which the universe expands, maybe fixing a long-standing downside in cosmology or going additional into it.

The remark confirms a disparity between the 2 predominant strategies of measuring pace the universe it is increasing, conforming to 1 however not the opposite, a brand new research experiences.

Researchers from the Stellar Commonplace Candles and Distances group used knowledge collected by Europe’s Gaia spacecraft to check Cepheid variable stars, which pulsate frequently, offering a technique to precisely measure cosmic distances. The Cepheid star measurement method expands on different strategies, such because the one primarily based on kind 1a observations supernova.

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