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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

How are black hole masses measured and why is the EHT remarkable?

Shobita explains Doppler broadening, stellar proper motions, and the Event Horizon Telescope's global VLBI achievement imaging black hole shadows.

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