Parts I and II of this study traced the development of the Hill–Brown lunar theory (1) starting from George W. Hill’s determination of the parameters of the Variation Curve in 1877–78, (2) continuing with Ernest W. Brown’s computation in the years 1891–1908 of the 3000 or so additional terms required to yield the coordinates accurately to 0˝.01 in latitude and longitude and to 0.001 in sine parallax, and (3) ending with the incorporation of these terms in the Brown-Hedrick Tables of the Motion of the Moon, published in 1919.


Universal Time Atomic Clock Monthly Notice Royal Astronomical Society Gravitational Source 
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Copyright information

© Springer New York 2010

Authors and Affiliations

  1. 1.St. John’s CollegeAnnapolisUSA

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