Skip to main content

Cambridge University Libraries are providing a blend of online and controlled in-person services. Please see our website for more details.

Script for 'The Night Sky in May', 1958-05

Reference Code: GBR/0180/RGO 45/334

Scope and Contents

An annotated copy of Porter's script for 'The Night Sky in May' on the Plough overhead, Arcturus in the south, Leo in the west, and Jupiter below Arcturus near Spica in Virgo; the retrograde motion of the planets, the difficulty in observing this motion and the lack of perspective in the sky; the misleading impression of distance given if apparent brightness is relied on, the proper motion of stars, and the importance of their distribution in this galaxy and their movements; the difficulties and errors of these measurements and the improvement in accuracy attained over the years; Edmond Halley and the motion of Arcturus since Ptolemy's catalogue, Arcturus being a 'high velocity star', stars which generally do not move in the galactic plane, and the actual motion of the Sun about the galactic centre; the astronomy of the nineteenth century; the contemporary vogue for astrophysics; the modern astronomer's attitude to figures in astronomy being due to the figures involved; and the 'Cosmic year'.


  • 1958-05

Conditions Governing Access

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 12:43:16+00:00

Includes index.

Repository Details

Part of the Cambridge University Library Repository

Cambridge University Library
West Road
Cambridge CB3 9DR United Kingdom

The UK Archival Thesaurus has been integrated with our catalogue, thanks to Kings College London and the AIM25 project for their support with this.