Contents 



Page 



FOREWORD v 



PREFACE vii 



WORKSHOP MEMBERS xi 



EXECUTIVE SUMMARY xv 



CHAPTER I - BIOLOGY AND THE SPACE SCIENCES 1 



CHAPTER II -OBSERVATIONAL AND EXPERIMENTAL 



OPPORTUNITIES IN EARTH ORBIT 7 



2.1 Free-Flying Spacecraft and the Space Shuttle 7 



2.2 Space Station 13 



2.3 Lunar Base 15 



CHAPTER III - OBSERVATIONAL EXOBIOLOGY 19 



3.1 Cosmic History of the Biogenic Elements and Compounds 20 



3.2 Remote Observations 24 



3.3 Planetary Atmospheres 29 



3.4 Titan 35 



3.5 Comets 37 



3.6 Asteroids and Meteors 41 



3.7 The Protosolar Nebula and its Analogs 45 



3.8 The Detection of Other Planetary Systems 53 



3.9 Molecules in Space 57 



3.10 Interstellar Dust 64 



3.1 1 Evolution of Elemental Abundances in Galaxies 72 



CHAPTER IV - COSMIC DUST COLLECTION 77 



4.1 State of Knowledge 78 



4.2 Science Questions 79 



4.3 Technical Approach 81 



4.4 Technology Needs 85 



4.5 Opportunities 86 



4.6 Conclusions 87 



mi 



