World Solve — A living repository of problems worth solving.

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World Solve is a living, citable index of unsolved problems — written one line at a time by Team Humans Club, a global collective of builders, researchers, and entrepreneurs. We do not solve the problems here. We Democratize Innovation.

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We cannot directly detect low-frequency gravitational waves from supermassive black hole binaries.

open Global / Unspecified, Global

Ground-based laser interferometers like LIGO can only hear high-frequency stellar-mass black hole collisions. Space-based interferometers with million-kilometer laser baselines (like LISA) are required.

frequency black hole cannot directly science-space

WS02111 · Logged by Ian Patel on 2026-07-22T08:00:00Z · Horizon: 2034 · Working on: 0

Citation ID: WS02111 Title: We cannot directly detect low-frequency gravitational waves from supermassive black hole binaries. URL: https://www.worldsolve.org/index.php?api=problem&id=2111

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2165 public problems
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