Extreme Universe: What Do I Already Know About This?Black Holes, Neutron Stars, and SupernovaeSeries "In Twelve Evenings" Book 10Vita HarwoodTest your knowledge!What happens when a star can no longer support its own weight? How do astronomers detect a black hole when light cannot return from beyond its event horizon? And how can a detector on Earth tell that spacetime itself has trembled after two compact objects collide?Extreme Universe takes readers from strong gravity and stellar collapse to black holes, neutron stars, pulsars, magnetars, supernovae, kilonovae, and gravitational waves. Across twelve evenings, the course builds one connected picture of what happens when matter, light, and gravity are pushed toward physical limits. Just as importantly, it separates what scientists directly measure from what they infer through models, and from what remains genuinely unknown.There is no university-level mathematics. Equations appear only when they clarify a physical relationship. Every lesson combines a clear main narrative with a scientist portrait, a verified Plot Twist, key terms, a ten-question test, and a home experiment that lets readers examine the logic behind real measurements.Written for readers aged 15 and up, as well as adults starting from scratch, Extreme Universe offers serious astrophysics without textbook dryness or sensational shortcuts. If black holes, superdense matter, exploding stars, and gravitational waves make you want to know how we actually know what we know, this book gives you a structured way in.
