Overview

Every few hours, somewhere in the distant universe, a star dies in a way that releases more energy in a few seconds than the Sun will emit across its entire ten-billion-year lifetime. Not a supernova. Not a nuclear reaction in any ordinary sense. A gamma-ray burst - the most powerful explosion the cosmos is capable of producing, visible from across the observable universe, and for decades one of the deepest mysteries in all of astronomy. In The Violent Universe, Marcus Veylan tells the complete story of gamma-ray bursts: how they were discovered by accident by Cold War satellites designed to watch for nuclear weapons tests, what thirty years of confusion and fierce scientific debate revealed about their nature, and what the spectacular multi-messenger observations of the twenty-first century have confirmed about where they come from and what they mean. Long gamma-ray bursts are the deaths of massive stars - collapsing into black holes and firing twin jets of plasma outward at nearly the speed of light. Short gamma-ray bursts are something even stranger: the mergers of binary neutron stars, spiralling together for billions of years before colliding in a fraction of a second of catastrophic violence. That collision was detected in 2017 as both a gravitational wave and a gamma-ray burst simultaneously - one of the most scientifically productive single events in the history of astronomy. Inside this book: - The Cold War satellites that accidentally discovered the universe's most powerful explosions - The Great Debate of 1995 - near or cosmological? - and the single observation that settled it - The collapsar model: how a dying massive star powers a relativistic jet through sheer gravitational violence - GW170817 and GRB 170817A - the moment neutron star mergers were confirmed as gamma-ray burst engines - The kilonova that forged gold, platinum, and uranium in real time - Could a gamma-ray burst sterilise Earth? The science behind the Ordovician extinction hypothesis - The BOAT - GRB 221009A - the brightest gamma-ray burst ever recorded, and what it revealed - The next generation of observatories hunting bursts at the edge of the observable universe The Violent Universe is popular science at the extreme frontier - honest, deep, and built for readers who want to understand the cosmos at its most astonishing.

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