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Script for 'The Night Sky in July', 1953-07

Reference Code: GBR/0180/RGO 45/276

Scope and Contents

A copy of Porter's script for 'The Night Sky in July' on the Milky Way, including its stars counted by William Herschel, its shape, and its centre situated in the direction of Sagittarius; the path of the Milky Way flowing through Aquila, Cygnus and Cassiopeia, and the number of stars in our galaxy; the resolution of stars in other galaxies established using red-sensitive photographic plates taken with the 100" Mount Wilson telescope; proof that our galaxy is a spiral, confirmed by Dutch radio-astronomers; the position of the visible arms in the sky; and contemporary ideas on distances in the universe being too low.


  • Creation: 1953-07


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 12:40:00+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