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Ancient Astronomical Observations and the Accelerations of the Earth and Moon
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The article was published on 1970-08-01 and is currently open access. It has received 69 citations till now. The article focuses on the topics: History of astronomy.read more
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The Maunder Minimum
TL;DR: In the years around a sunspot maximum there is seldom a day when a number of spots cannot be seen, and often hundreds are present.
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The fundamental constants and their variation: observational and theoretical status
Abstract: This article describes the various experimental bounds on the variation of the fundamental constants of nature. After a discussion of the role of fundamental constants, their definition and link with metrology, it reviews the various constraints on the variation of the fine-structure constant, the gravitational, weak- and strong-interaction couplings and the electron-to-proton mass ratio. The review aims (1) to provide the basics of each measurement, (2) to show as clearly as possible why it constrains a given constant, and (3) to point out the underlying hypotheses. Such an investigation is of importance in comparing the different results and in understanding the recent claims of the detection of a variation of the fine-structure constant and of the electron-to-proton mass ratio in quasar absorption spectra. The theoretical models leading to the prediction of such variation are also reviewed, including Kaluza-Klein theories, string theories, and other alternative theories. Cosmological implications of these results are also discussed. The links with the tests of general relativity are emphasized.
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Long-Term Fluctuations in the Earth's Rotation: 700 BC to AD 1990
F. R. Stephenson,L. V. Morrison +1 more
TL;DR: In this paper, results from previous analyses of lunar occupations in the period AD 1600-1955.5, and from high-precision data in AD 1955.5-1990, are included in the dataset considered in this paper.
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Tidal Dissipation in the Oceans: Astronomical, Geophysical and Oceanographic Consequences
TL;DR: The most precise way of estimating the dissipation of tidal energy in the oceans is by evaluating the rate at which work is done by the tidal forces and this quantity is completely described by the fundamental harmonic in the ocean tide expansion that has the same degree and order as the forcing function as mentioned in this paper.
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Moon-Earth-Sun: The oldest three-body problem
TL;DR: In this paper, a case study of the many stages that characterize the slow development of a problem in physics from simple observations through many forms of explanation to a high-precision fit with the data is presented.