"Version: 20191201"--Title page verso.Includes bibliographical references.1. Introduction -- 1.1. The dawn of Doppler measurements -- 1.2. Early work on stellar radial velocity measurements -- 1.3. Toward precise stellar radial velocity measurements -- 1.4. The early hints of exoplanets -- 1.5. The 51 Peg revolution -- 1.6. The Doppler method2. The instruments for Doppler measurements -- 2.1. E…