The Sky at Night — 1973

E01 1973 - an Exciting Year! 08 Jan 1973 E02 Practical Work in the Observatory 07 Feb 1973 E03 Sirius - The Brightest Star 19 Mar 1973 E04 The Eclipse of the Century 02 Apr 1973 E05 How Big are the Planets? 30 Apr 1973 E06 The Colours of the Stars 04 Jun 1973 E07 The African Eclipse 11 Jul 1973 E08 Navigational Astronomy 01 Aug 1973 E09 Venus - A Cratered World 22 Aug 1973 E10 The Moon Illusion 18 Sep 1973 E11 The Volcanoes of Mars 17 Oct 1973 E12 When Mercury Crosses the Sun 07 Nov 1973 E13 Pioneer to Jupiter 12 Dec 1973