Marcus Chown, Sunday, 6-8-25

The Space Show

I introduced Marcus Chown, an award-winning writer and former radio astronomer at Caltech, to discuss his latest book "A Crack in Everything: How Black Holes Came in from the Cold and Took Cosmic Center Stage." Marcus shared his personal journey into astronomy, inspired by his father's gift of an astronomy book and witnessing the moon landing as a child. He discussed the evolution of black hole science, explaining how they were initially considered fictional but became central to understanding the universe. Marcus detailed the discovery of the first black hole in 1971 and its connection to Cygnus X-1, a binary star system where a giant star is being pulled into a black hole, emitting X-rays. He also explained how supermassive black holes were discovered before stellar mass black holes, with the Hubble Space Telescope revealing their prevalence in galaxies. Marcus clarified that light from black holes does not escape from within but is emitted by matter swirling around them before falling in. Much more was discussed during this 77 minute listener and guest discussion.