Observing and Measuring Visual Double Stars

The book "Observing and Measuring Visual Double Stars" in its second edition is a comprehensive work for anyone seriously interested in the observation and measurement of double stars. It provides a detailed introduction to the necessary equipment, ranging from simple commercial instruments to homemade devices. Various observation methods are thoroughly discussed, starting from the use of binoculars to advanced techniques such as speckle interferometry. A dedicated section covers the astronomy of double stars, including orbital calculations. This updated edition includes many new contents based on recent observations and offers valuable information on astrometry via the internet. Additionally, the sketching of double stars is addressed, a topic that was not covered in the first edition. The chapters and tables have been nearly completely updated to reflect the latest developments in astronomy.