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Hansen, Peter Andreas (1795-1874) astronomer
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Autograph letter signed to J.C. Adams

  • Adams/Box 5-15/Box 13/39/2
  • Item
  • 8 May 1847 (No year given: paper referred to was given by JCA at the meeting of the RAS Fri. 14 May 1847.)

    • Part of Papers of John Couch Adams

Congratulations on comments made about JCA by Hansen. Demands paper on Neptune before Friday next.

Sheepshanks, Richard (1794-1855) astronomer

Autograph letter signed to J.C. Adams

Encloses testimonial for JCA for professorship of Geometry at Gresham Coll. Hansen's latest papers. Challis's paper.

Lubbock, Sir John William (1803-1865) 3rd Baronet, astronomer and banker

Autograph letter signed to J.C. Adams

Hansen's prize [from the Admiralty for work on the moon]. Secular inequality of the Moon's mean motion: Plana.

Lubbock, Sir John William (1803-1865) 3rd Baronet, astronomer and banker

Copy of letter to W. Whewell

In JCA's hand. Sends two equations from Hansen to explain the inequality of the moon's motion [missing]. Requests that JCA may be allowed to see the letter.

Airy, Sir George Biddell (1801-1892) Knight, astronomer

Draft autograph letter signed to Simon Newcomb

Proper comparison of Hansen's and Delaunay's equations of Longitude, Latitude and Parallax [of the moon] much needed. Description of such comparisons as already exist. JCA's own parallax tables. Tables of Moon's Ephemeris might be obtained from Hind: JCA will enquire. Hill's computation of the perturbations of Jupiter and Saturn very worthy.

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

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