Bob ArgyleBob Argyle has observed double stars since 1966. He has been Director of the Webb Deep-Sky Society's Double Star Section since 1970. He edited Observing and Measuring Visual Double Stars (2012) and writes monthly columns on double stars for AstronomyNow and the Webb Society. He is a Fellow of Royal Astronomical Society, a Member of the International Astronomical Union and Editor of Observatory magazine. Read More Read Less