n MNASSA : Monthly Notes of the Astronomical Society of South Africa - The nearest stars : presidential address 2013

Volume 72, Issue 7_10
  • ISSN : 0024-8266



In this article it is shown how the improvement in the accuracy of star position measurements over the past 400 years led first to the discovery of 'Proper Motions' - the individual movements of the stars - and afterwards to 'Parallaxes' or the measurement of their distances by trigonometry. The pioneering work is described.

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