How fast is the universe actually expanding? Ripples in spacetime could finally solve 'Hubble tension'

Using gravitational waves as a measure of the universe's rate of expansion could solve the biggest headache in physics, the so-called "Hubble tension."

🔗 Read more: https://www.space.com/astronomy/how-fast-is-the-universe-actually-expanding-ripples-in-spacetime-could-finally-solve-hubble-tension

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