Astronomical photometry is the science of measuring the brightness and colours of stars and other celestial objects. It is a technique at the very heart of modern astrophysics. This authoritative volume traces the fascinating historical development of astronomical photometry - from visual techniques at the time of William Herschel in the 1780s, through to the birth of photometry with charge-coupled devices in the 1970s. In this intriguing survey, we see how the advent of new technology has revolutionized the science of photometry at each stage of its development, and what dramatic advances have been achieved, despite several major disasters - especially in the practice of photographic photometry. This book also clearly illustrates the critical relationship between the development of a science and the technology it uses. This volume provides professional astronomers with a valuable guide to the background and development of this fundamental technique. It will also be of great interest to amateur astronomers and historians of the physical sciences.

Astronomical photometry is the science of measuring the brightness and colours of stars and other celestial objects. It is a technique at the very heart of modern astrophysics. This authoritative volume traces the fascinating historical development of astronomical photometry - from visual techniques at the time of William Herschel in the 1780s, through to the birth of photometry with charge-coupled devices in the 1970s. In this intriguing survey, we see how the advent of new technology has revolutionized the science of photometry at each stage of its development, and what dramatic advances have been achieved, despite several major disasters - especially in the practice of photographic photometry. This book also clearly illustrates the critical relationship between the development of a science and the technology it uses. This volume provides professional astronomers with a valuable guide to the background and development of this fundamental technique. It will also be of great interest to amateur astronomers and historians of the physical sciences.

This volume is the proceedings of IAU Symposium No. 118 on "Instrumentation. and Research Programmes for Small Telescopes," where small telescopes were defined as those ground-based instruments with apertures less than 1.5m. The scientific goal of the symposium was to emphasise research programmes which were more suited to smaller tele scopes, on which frequent regular observations can be made. A wide variety of topics on instrumentation, photometry, spectroscopy and polarimetry of objects in the solar system to extragalactic systems were discussed. Each of the four scientific days of the symposium comprised a number of invited review papers, contributed oral papers and discussion sessions devoted purely to the large number ( 4) of poster papers. An introductory paper on the research potential of small telescopes sets the scene for the symposium. The proceedings have then been divided into three sections. Section I: Telescopes and instrumentation; Section II: Photometric research programmes; Section III: Spectroscopic research programmes. The diversity of topics within each of these sections indicated the extent to which small telescopes have (and can) contribute greatly to astronomical research. Dr J.A. Graham's summary of the symposium, which illustrates the opportunities available with small telescopes, concludes these proceedings. As in all symposia, the importance of the discussion following each paper was realised. The discussion was recorded on tape (and wherever possible on questions and answer sheets), transcribed and then edited."