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James Trefil and Shobita Satyapal, "Supermassive: Black Holes at the Beginning and End of the Universe" (Smithsonian Books, 2025)

New Books in Science

00:00

What is the cosmic gravitational-wave hum detected by pulsar arrays?

Shobita describes the stochastic low-frequency background from merging supermassive black holes measured via pulsar timing arrays.

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