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Script for 'The Night Sky in September', 1954-09

Reference Code: GBR/0180/RGO 45/290

Scope and Contents

A copy of Porter's script for 'The Night Sky in September' on the Milky Way making spectacular viewing through field glasses; Vega, Cygnus and Lyra; Albireo, a double star, and other double stars, such as Alcor and Mizar and Epsilon Lyrae; studies of William Herschel and the parallax principal applied to double stars; the discovery that some double stars are not just line-of-sight phenomena, but stars physically related and revolving about one another; the universality of the law of gravitation; Bessel and the path of Sirius in space, the companion star Sirius B, spectroscopic doubles, the origins of double stars and the differences between them; multiple stars, Epsilon Lyrae, the Pole Star and Castor; the perturbation of stars and comets by other stars; the current neglect of double star work in Britain, Herschel's tradition and his dedication.


  • Creation: 1954-09


Conditions Governing Access

From the Management Group:

Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (


5 page(s)

Language of Materials


Finding aid date

2007-04-13 12:40:44+00:00

Includes index.

Repository Details

Part of the Cambridge University Library Repository

Cambridge University Library
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Cambridge CB3 9DR United Kingdom