1973 — Edward Tryon proposes that the universe may be a large scale quantum mechanical vacuum fluctuation where positive mass-energy is balanced by negative gravitational potential energy
19 September 1973 discovery of 2643 Bernhard
20 September 1973 discovery of 1921 Pala
22 September 1973 discovery of 2644 Victor Jara and 3009 Coventry
28 September 1973 discovery of 1860 Barbarossa
30 September 1973 discovery of 5342 Le Poole
17 December 1973, Death of Charles Greeley Abbot in Washington, USA
1973 Death of (Emmeline) Jean Hanson
1973 Death of Walter Rudolf Hess
1973 Death of Alfred Harrison Joy
Physics to Leo Esaki and Ivar Giaever "for their experimental discoveries regarding tunneling phenomena in semiconductors and superconductors, respectively" and to Brian David Josephson "for his theoretical predictions of the properties of a supercurrent through a tunnel barrier, in particular those phenomena which are generally known as the Josephson effects"
Chemistry to Ernst Otto Fischer and Geoffrey Wilkinson "for their pioneering work, performed independently, on the chemistry of the organometallic, so called sandwich compounds"
Physiology or Medicine to Karl von Frisch, Konrad Lorenz and Nikolaas Tinbergen "for their discoveries concerning organization and elicitation of individual and social behaviour patterns"