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Script for 'The Night Sky in September', 1952-09

Reference Code: GBR/0180/RGO 45/266

Scope and Contents

An annotated copy of Porter's script for 'The Night Sky in September' on the Harvest Moon rising at the same time each evening; Jupiter's moons and the discovery of the 12th moon at the Mount Wilson Observatory in the previous year; the orbits of the four larger moons; Jupiter in Taurus near the Pleiades; the apparent retrograde motion of the planets; the epicycle theory and its overthrow by observation of Jupiter's moons; Milton and Galileo, Roemer and the velocity of light and its finite value.


  • Creation: 1952-09


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 12:39:30+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