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JD6 -Time and Astronomy Preface and Posters

Published online by Cambridge University Press:  21 October 2010

Pascale Defraigne
Pascale Defraigne*
Affiliation:
Royal Observatory Belgium, BE 1180 Brussels, Belgium
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Responsibility for the definition of time scales left the astronomical community some 40 years ago when, in 1967, the second became defined by an atomic transition in the International System of units SI and when International Atomic Time (TAI) was defined as the primary international time scale in 1971.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 205 - 206
Copyright
Copyright © International Astronomical Union 2010