
New Books in Science Marcus Chown, "A Crack in Everything: How Black Holes Came in from the Cold and Took Cosmic Centre Stage" (Apollo, 2025)
Nov 7, 2025
In this enlightening discussion, Marcus Chown, a former radio astronomer and acclaimed science writer, delves into the mysteries of black holes. He explores their fascinating history, from Einstein's initial skepticism to their critical role in our understanding of the cosmos. Chown shares anecdotes from interviews with key scientists and discusses groundbreaking discoveries like Cygnus X-1. He also unpacks the enigmatic concepts of Hawking radiation and gravitational waves, shedding light on how these cosmic phenomena shape our universe.
AI Snips
Chapters
Books
Transcript
Episode notes
How Cygnus X-1 Was Found
- Paul Murdin used X-ray catalogs from Uhuru to hunt for interesting objects and focused on Cygnus X-1 as a promising candidate.
- Matching X-ray position to a bright blue supergiant and orbital motion led Murdin and Louise Webster to identify the first stellar-mass black hole.
Gravitational Waves Confirm Real Black Holes
- Gravitational waves from merging black holes provided definitive direct evidence that black holes exist.
- LIGO's 2015 detection opened gravitational-wave astronomy and validated theoretical predictions from general relativity.
Gravitational Waves: The Voice Of Space
- Gravitational waves are vibrations of spacetime, giving astronomers a new sense akin to 'hearing' the universe.
- Detectable waves require colossal events because spacetime is extremely stiff compared to ordinary materials.




