Space Science in the Twenty-First Century: Imperatives for the Decades 1995 to 2015 -- Copyright -- FOREWORD -- PREFACE -- Contents -- PART A GRAVITATIONAL PHYSICS -- 1 Introduction -- 2 Basic Issues in Gravitation -- TESTS OF FUNDAMENTAL PRINCIPLES -- WEAK FIELD -- STRONG FIELD -- NONSTATIC FIELDS -- COSMOLOGY -- 3 Gravitational Wave Astronomy -- 4 Current Space Research in Gravitation -- LUNAR RANGING -- ANALYSIS OF PLANETARY AND LUNAR MOTION -- 5 Expected Research Prior to 1995 -- SHUTTLE TEST AND FLIGHT OF GRAVITY PROBE B (GPB) -- SHUTTLE FLIGHT OF A CRYOGENIC PRINCIPLE OF EQUIVALENCE EXPERIMENT -- MICROWAVE RANGING TO THE MARS OBSERVER SPACECRAFT -- X-RAY TIMING EXPERIMENT AND A MEDIUM-AREA FAST X-RAY DETECTOR ON THE SHUTTLE -- SPACECRAFT OBSERVATIONS OF LONG-PERIOD GRAVITATIONAL WAVES -- 6 Programs After 1995 -- BASELINE PROGRAM -- Lagos: Laser Gravitational Wave Observations in Space -- Points: Small Astrometric Interferometer in Space -- Mercury Relativity Satellite -- Starprobe: Second-Order Gravitational Red Shift Experiment -- High-Precision Principle of Equivalence Experiment -- X-ray Large Array/Fast-timing Experiments and Correlation with Gravitational Radiation -- ENHANCED PROGRAM -- Laser Gravitational Wave Observatory -- Reflight of GPB -- 7 Technology Requirements -- IMPROVED DISTURBANCE COMPENSATION SYSTEMS (DISCOS) -- MODERATE-POWER FREQUENCY-STABILIZED LASERS -- CRYOGENIC CAPABILITY TO TRANSFER HELIUM IN ORBIT -- DEVELOPMENT OF CLOCKS -- PART B SCIENCE IN A MICROGRAVITY ENVIRONMENT -- 1 Introduction -- 2 Gravity-Sensitive Systems at Equilibrium -- CRITICAL PHENOMENA -- MECHANICS OF GRANULAR MEDIA -- 3 Gravitational Destabilization of Stationary States -- MECHANICS OF SUSPENSIONS -- SHEARED SUSPENSIONS OF GRANULAR MATERIALS -- GROWTH OF CONDENSATES IN SUPERSATURATED SYSTEMS -- FRACTAL AGGREGATES.

4 Systems Far from Equilibrium -- SOLIDIFICATION PATTERNS -- SURFACE TENSION AND CONVECTION EFFECTS -- Minimizing Buoyancy-driven Effects -- Minimizing Free Surface Deflections -- MINIMIZING THE EFFECT OF GRAVITY ON FREE SURFACE SHAPES -- ELECTROKINETICS -- COMBUSTIBLE MEDIA -- 5 Scaling and Acceptable Acceleration Level -- 6 Discussion and Recommendations.