## An introduction to modern cosmologyA concise, accessible introduction to this exciting and dynamic subject. * Adopts an approach grounded in physics rather than mathematics. * Includes worked examples and student problems, along with hints for solving them and the numerical answers. * Many reviewers have commented that this is one of the best 'introductory undergraduate level' texts on the subject and they would all welcome a Second Edition. |

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### Contents

Eales Coel Hellier and Linda Smith for numerous detailed comments which led to | 3 |

Observational Overview O0lUJU3 | 4 |

Newtonian Gravity | 17 |

Copyright | |

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Advanced Topic angular diameter distance anisotropies atoms baryon number black-body Chapter comoving coordinate corresponding cosmic microwave background cosmological constant cosmological models cosmological principle cosmologists critical density curvature dark matter deceleration deceleration parameter decoupling deﬁned deﬁnition density parameter derivation discussed distribution electrons energy density estimate evolution expansion rate ﬁeld ﬁnal ﬁnd ﬁnite ﬁrst ﬁxed ﬂat geometry ﬂuid equation ﬂux Friedmann equation galaxy clusters given gives helium-4 Hot Big Bang Hubble constant Hubble parameter inﬁnite inﬂation inﬂationary interactions known light luminosity distance mass mass—energy material matter density matter dominated means measured megaparsecs metric neutrino non-relativistic nuclei nucleosynthesis number density observable Universe particle physics photons possible predicted present Universe Problem properties protons and neutrons radiation dominated radius redshift region relative relativistic scale factor shown in Figure signiﬁcant solution spatially-ﬂat spectrum sphere stars structure formation sufﬁciently supemovae surface temperature thermal equilibrium topology typical Universe expands velocity