If the Hubble tension is real, what’s the solution?
<p>Both of these methods rely on the same laws of physics, the same underlying theory of gravity, the same cosmic ingredients, and even the same equations as one another. And yet, when we actually perform our observations and make those critical measurements, we get two completely different answers that don’t agree with one another. This problem, that the first method yields 67 km/s/Mpc and the second yields 73-to-74 km/s/Mpc, with only a ~1% uncertainty to each method, is <a href="https://bigthink.com/starts-with-a-bang/conundrum-universe-expanded/" rel="noopener ugc nofollow" target="_blank">known as the Hubble tension</a>, and is arguably the most pressing problem in cosmology today.</p>
<p>Some still hold out hope that the true answer lies somewhere between these two extremes, but the errors are small and both groups are confident in their conclusions. So if they’re both correct, what does that mean for the Universe?</p>
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