1: Sir Fred Hoyle: Comets: a matter of life and death. 2: R A Lyttleton: Gravitation, ancient eclipses, and mountains. 3: S Chandrasekhar: E A Milne: his part in the development of modern astrophysics. 4: Sir Martin Rees: Our universe and others. 5: T G Cowling: Astrology, religion and science. 6: A W Wolfendale: The origin of cosmic rays. 7: D G Kendall: Statistics, geometry and the cosmos. 8: D G King-Hele: The Earth's atmosphere: ideas old and new. 9: Sir William McCrea: Time, vacuum and cosmos. 10: W A Fowler: The age of the observable universe. 11: Sir Michael Atiyah: Geometry, topology and physics. 12: V Radhakrishnan: Polarization - its message in astronomy. 13: T Gold: Carbon - the element of life: what is its origin on Earth?. 14: D W Sciama: Cosmology and particle physics: a new synthesis. 15: Freeman Dyson: Hunting for comets and planets. 16: Malcolm Longair: Modern cosmology - a critical assessment. 17: J H Taylor: Binary pulsars and relativistic gravity. 18: R Kirshner: Taking the measure of the universe: How big? How old? How do we know?. 19: J C Mather: Observing the Big Bang. 20: Professor Sir Roger Penrose: The complexity of our singular universe
