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Hansen, Peter Andreas (1795-1874) astronomer
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Autograph copy of letter to G.B. Airy

Letter from Hansen to G.B.A. in Monthly Notices R.A.S. Nov. 8 1861. Hansen's memoir on the perturbations of the small planets: where he is wrong; where the translation is at fault.

Adams, John Couch (1819-1892) astronomer

Autograph letter signed to A. Cayley

Acknowledgement of paper on Hansen's theory. AC's treatment of Lunar theory by method of variation of elements is new; outlines the possible difficulties. JCA is applying this method to the secular inequalities of the moon's mean motion, further to paper in PTRS, 1853.

Adams, John Couch (1819-1892) astronomer

Autograph letter signed to J.C. Adams

In French. Seeks opinion of Memoire sur les Satellites de Jupiter. Sends two papers from Memories de l'Academie de Belgique on the movement of stars in the solar system. Furthering work on Hansen on the relative movement of three bodies. Satellites of Jupiter has been awarded a Damoiseau prize by the Academie des Sciences.

Souillart, C (fl 1878-1893)

Autograph letter signed to J.C. Adams

Airy received letter from De La Rue with JCA's comments on Hansen's investigation of Secular Acceleration of Moon's Mean Motion. Discusses error of Hansen's.

Stone, Edward James (1831-1897) astronomer

Autograph letter signed to J.C. Adams

Introducing W. Hillhouse who is visiting England. On new method of calculation for special perturbations. Published by G.P.B.; subsequently published as original by Encke; reviewed as original by Hansen. G.P.B. not happy. Advantages of new method.

Bond, G P (fl 1852)

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