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James Webb telescope confirms there is something seriously wrong with our understanding of the universe
(www.livescience.com)
this post was submitted on 16 Mar 2024
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From my limited understanding, the discrepancy comes from the two ways to measure the universe's expansion: calculation from cosmic microwave background and calculating a cepheid variable, which uses pulsating stars (pulsars?)
Isn't it more likely that one, or both, ways of measuring are wrong? As in, they're not useful for measuring the universe's rate of expansion?
I'm trying to understand the distinction you are making. Could you elaborate?
I think the distinction is between arguing that there's a discrepancy because the measurement is bad, or because the measurement doesn't measure what we think it measures.
Is the theory right and we have a measurement error, or is the theory flat out wrong?
The model is wrong. Get hype
Not a scientist but the article seems to mean that they checked that the tools themselves had no defects giving incorrect measurements.
This comment seems to be questioning the methodology of how we measure the rate of expansion so tackles a different aspect of the conversation.
But that's about as much as I can contribute haha
Pretty much this. In a (hopefully) more direct metaphor, are we sure we're using a ruler to calculate the length of a line, and not using a ruler to calculate the temperature of a paper?