JWST Probes Cosmic Expansion

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Hubble constant

Space

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James Webb Space Telescope suggests 'new cosmic feature' is needed to solve 'Hubble trouble'

Summary

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80% Informative

James Webb Space Telescope (JWST) conducted its largest survey yet of the accelerating expansion of the cosmos.

JWST 's survey served to cross-check observations made by Hubble that suggested a discrepancy in measurements of the rate of cosmic expansion, known as the Hubble constant.

This issue has been termed "Hubble tension," and these new findings show errors in data from the long-serving space telescope of the same name are not responsible for it.

The JWST data shows the Hubble constant is nearly identical to the value of 162849 mph per Mpc found by Hubble .

This eliminates the possibility that the Hubble tension is just an artifact arising from bias in the long-serving space telescope's measurements.

Of course, this means there is still a problem of Hubble tension that needs to be tackled.

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