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Contents

TITLE PAGE

PREFACE

1. HISTORICAL BACKGROUND

1.1. Introduction: the Energy Problem
1.2. The Discovery
1.3. The Nature of Redshift
1.3.1. Doppler Shift
1.3.2. Gravitational Redshift
1.3.3. Cosmological Redshift
1.4. Physical Characteristics: Quasars
1.5. Physical Characteristics: Active Galactic Nuclei

Chapter Contents