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Dive into a mind-bending exploration of the physics of black holesBlack holes, predicted by Albert Einstein's general theory of relativity more than a century ago, have long intrigued scientists and the public with their bizarre and fantastical properties. Although Einstein understood that black holes were mathematical solutions to his equations, he never accepted their physical reality-a viewpoint many shared. This all changed in the 1960s and 1970s, when a deeper conceptual understanding of black holes developed just as new observations revealed the existence of quasars and X-ray binary star systems, whose mysterious properties could be explained by the presence of black holes. Black holes have since been the subject of intense research-and the physics governing how they behave and affect their surroundings is stranger and more mind-bending than any fiction.After introducing the basics of the special and general theories of relativity, this book describes black holes both as astrophysical objects and theoretical "laboratories" in which physicists can test their understanding of gravitational, quantum, and thermal physics. From Schwarzschild black holes to rotating and colliding black holes, and from gravitational radiation to Hawking radiation and information loss, Steven Gubser and Frans Pretorius use creative thought experiments and analogies to explain their subject accessibly. They also describe the decades-long quest to observe the universe in gravitational waves, which recently resulted in the LIGO observatories' detection of the distinctive gravitational wave "chirp" of two colliding black holes-the first direct observation of black holes' existence.The Little Book of Black Holes takes readers deep into the mysterious heart of the subject, offering rare clarity of insight into the physics that makes black holes simple yet destructive manifestations of geometric destiny.

Black holes (Astronomy) --- Frozen stars --- Compact objects (Astronomy) --- Gravitational collapse --- Stars --- A-frame. --- Acceleration. --- Accretion disk. --- Alice and Bob. --- Angular momentum. --- Astronomer. --- Atomic nucleus. --- Binary black hole. --- Binary star. --- Black hole information paradox. --- Black hole thermodynamics. --- Black hole. --- Calculation. --- Circular orbit. --- Classical mechanics. --- Closed timelike curve. --- Cosmological constant. --- Curvature. --- Cygnus X-1. --- Degenerate matter. --- Differential equation. --- Differential geometry. --- Doppler effect. --- Earth. --- Einstein field equations. --- Electric charge. --- Electric field. --- Electromagnetism. --- Ergosphere. --- Escape velocity. --- Event horizon. --- Excitation (magnetic). --- Frame-dragging. --- Galactic Center. --- General relativity. --- Gravitational acceleration. --- Gravitational collapse. --- Gravitational constant. --- Gravitational energy. --- Gravitational field. --- Gravitational redshift. --- Gravitational wave. --- Gravitational-wave observatory. --- Gravity. --- Hawking radiation. --- Inner core. --- Kerr metric. --- Kinetic energy. --- LIGO. --- Length contraction. --- Lorentz transformation. --- Magnetic field. --- Mass–energy equivalence. --- Maxwell's equations. --- Metric expansion of space. --- Metric tensor. --- Milky Way. --- Minkowski space. --- Negative energy. --- Neutrino. --- Neutron star. --- Neutron. --- Newton's law of universal gravitation. --- No-hair theorem. --- Nuclear fusion. --- Nuclear reaction. --- Orbit. --- Orbital mechanics. --- Orbital period. --- Penrose process. --- Photon. --- Physicist. --- Primordial black hole. --- Projectile. --- Quantum entanglement. --- Quantum gravity. --- Quantum mechanics. --- Quantum state. --- Quasar. --- Ray (optics). --- Rotational energy. --- Roy Kerr. --- Schwarzschild metric. --- Schwarzschild radius. --- Solar mass. --- Special relativity. --- Star. --- Stellar mass. --- Stephen Hawking. --- Stress–energy tensor. --- String theory. --- Supermassive black hole. --- Temperature. --- Theory of relativity. --- Thought experiment. --- Tidal force. --- Time dilation. --- Wavelength. --- White hole. --- Wormhole.

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"A critical history of the social media influencer's rise to global prominence Before there were Instagram likes, Twitter hashtags, or TikTok trends, there were bloggers who seemed to have the passion and authenticity that traditional media lacked. The Influencer Industry tells the story of how early digital creators scrambling for work amid the Great Recession gave rise to the multibillion-dollar industry that has fundamentally reshaped culture, the flow of information, and the way we relate to ourselves and each other. Drawing on dozens of in-depth interviews with leading social media influencers, brand executives, marketers, talent managers, trend forecasters, and others, Emily Hund shows how early industry participants focused on creating and monetizing digital personal brands as a means of exerting control over their professional destinies in a time of acute economic uncertainty. Over time, their activities coalesced into an industry whose impact has reached far beyond the dreams of its progenitors-and beyond their control. Hund illustrates how the methods they developed for creating, monetizing, and marketing social media content have permeated our lives and untangles the unforeseen cultural and economic costs. The Influencer Industry reveals how, in an increasingly fractured and profit-driven communications environment, the people we think of as "real" are merely those who have learned to exploit the industry's ever-shifting constructions of authenticity."--

Internet personalities --- Social media --- Authenticity (Philosophy) in mass media. --- Mass media --- Authorship --- Influencers (Internet personalities) --- Internet celebrities --- Social media influencers --- Celebrities --- Authorship. --- Influence (Psychology) --- Psychology --- Conformity --- Example --- Persuasion (Psychology) --- Absolute value. --- Activation. --- Afterhyperpolarization. --- Anonymity. --- Association of National Advertisers. --- Beauty. --- Big business. --- Blog. --- Business ethics. --- Business guru. --- Capacitor. --- Cations, Divalent. --- Chlorine. --- Circular orbit. --- Commodification. --- Common knowledge. --- Community leader. --- Company. --- Conformational change. --- Conjunction (astronomy). --- Constant term. --- Cyberspace. --- Dark matter. --- Dedoose. --- Direct marketing. --- Economic power. --- Electronic circuit. --- Elementary particle. --- Email. --- Employment. --- Estimation. --- Eva Chen. --- Facebook. --- Finance. --- Freelancers Union. --- Gmax. --- Google News. --- Hair care. --- Harvard Business School. --- Immigration. --- Industry. --- Influencer marketing. --- Information source. --- Insider. --- Instagram. --- InterViews. --- Jet Ski. --- Kamala Harris. --- Klout. --- Likert scale. --- Marketing plan. --- Marketing. --- Medium theory. --- Membrane potential. --- Mobile media. --- Nernst equation. --- New product development. --- Numerical analysis. --- Oppression. --- Optimism. --- Paul Lazarsfeld. --- Pension. --- Personality. --- Perversion. --- Pew Research Center. --- Phase lag (rotorcraft). --- Physical chemistry. --- Plus-size model. --- Politician. --- Precarity. --- Promoter (entertainment). --- Proprietary software. --- Public interest. --- Publicity stunt. --- Qualitative research. --- Quid Pro Quo. --- Raw material. --- Receptionist. --- Revenue model. --- Résumé. --- SAG-AFTRA. --- Self-brand. --- Sextus Empiricus. --- Shit. --- Social actions. --- Solar mass. --- Sponsor (commercial). --- Terminology. --- Three-body problem. --- Tidal force. --- Trade association. --- Trajectory. --- Transducer. --- Trove. --- Twitter. --- Understanding. --- Volt. --- Voltage divider. --- Voltage source. --- Webcam. --- Emigration and immigration. --- Industries. --- Interviews. --- New products. --- Chemistry, Physical and theoretical. --- Comprehension.