Cosmic expansion could be measured by the universe's gravitational hum
TL;DR Summary
Scientists propose using the stochastic gravitational-wave background—the faint, background hum from countless distant mergers—to measure the Hubble constant, offering an independent, multi‑messenger approach that could help resolve the long‑standing Hubble tension as gravitational‑wave detectors grow more sensitive.
Topics:science#astronomy#gravitational-waves#hubble-constant#hubble-tension#multi-messenger-astronomy#stochastic-siren
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