"Version: 20221001"--Title page verso.Includes bibliographical references.1. Introduction -- 1.1. Solving scientific problems -- 1.2. Solving astrophysical mysteries--deep space forensics -- 1.3. Further reading2. How we see the universe -- 2.1. Light -- 2.2. Particles -- 2.3. Gravitational waves -- 2.4. Looking back in time -- 2.5. Further reading3. Inventory of the universe--something is miss…