New Books in Popular Culture James Trefil and Shobita Satyapal, "Supermassive: Black Holes at the Beginning and End of the Universe" (Smithsonian Books, 2025)
Nov 8, 2025
Shobita Satyapal, a Professor of Physics and Astronomy at George Mason University, teams up with physicist James Trefil to discuss the captivating world of black holes. They dive into the history of these cosmic phenomena, exploring how supermassive black holes form, their role in galaxy evolution, and even their connections to stars and elements. Satyapal highlights groundbreaking discoveries from the James Webb Space Telescope and explains fascinating concepts like spaghettification and the black hole information paradox. Prepare to be intrigued by the mysteries of the universe!
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Jansky's Potato-Farm Radio Discovery
- Carl Jansky built a rotating antenna on a potato farm and discovered mysterious radio hiss coming from Sagittarius.
- That hiss was the first extragalactic radio signal, later linked to a black hole at our galaxy's center.
Infrared And Adaptive Optics Open The Center
- Infrared observations reveal the Milky Way's obscured center hidden by dust, and adaptive optics sharpen ground-based images.
- Correcting atmospheric blur let astronomers track stars orbiting the central black hole, confirming its presence.
Measuring Masses And Imaging Shadows
- Masses of black holes are inferred from orbital speeds via Doppler shifts or star motions; higher speeds imply larger mass.
- The Event Horizon Telescope created a planet-sized radio array to image the black hole shadow with unparalleled resolution.
