I. Zodiacal Light and F-Corona: Observations.- Zodiacal Light and Interplanetary Dust (IR).- Photographic Observations of the Inner Zodiacal Light Aboard Saliout.- Ground-Based Observations of Near Ecliptic Zodiacal Light Brightness.- An Isophote Map of the Zodiacal Light in V.- The Change in the Near-Ecliptic Zodiacal Light Brightness with Heliocentric Distance.- Zodiacal Light, Gegenschein and Sky Background.- Recent Rocket Observations of the Ultraviolet Spectrum of the Zodiacal Light.- A Search for Small Scale Structures in the Zodiacal Light.- An Observational Search for the Schuerman Dust Arcs.- IRAS Observations of the Interplanetary Dust Emission (IC).- Balloon Observation of the F-Corona at the 1983 Total Solar Eclipse (IC).- A Balloon Observation of the Thermal Radiation from the Circumsolar Dust Cloud in the 1983 Total Eclipse.- On the Solar Dust Ring(s).- The F-Corona and the Circum-Solar Dust Evidences and Properties (IR) 6.- Interpretation of F-Corona Radial Velocity Field.- Interferometric Observation of the F-Corona Radial Velocities Field Between 3 and 7 R?.- The Motion of Interplanetary Dust Particles.- Doppler Shifts Measurements of the Zodiacal Light at the Pic Midi Observatory.- II. Interplanetary Dust: Space and Ground Studies.- The Interplanetary Micrometeoroid Flux and Lunar Primary and Secondary Microcraters (IR).- Explorer 46 Meteoroid Bumper Experiment: Earth Orbital Debris Interpretation.- On the Earth’s Dust Envelope.- Orbits of Interplanetary Dust Particles Inside 1 AU as Observed by Helios.- Calibration of the Galileo/ISPM Dust Detectors with Iron Particles.- The LDEF Interplanetary Dust Experiment.- Measurements of the Elemental and Isotopic Composition of Interplanetary Dust Collected on LDEF.- Prospects for Cosmic Dust Experiments on the Planned Reflight of LDEF.- Acoustic Penetration and Impact Detector for Micrometeoroid and Space Debris Application.- An Empirical Penetration Equation for Thin Metallic Films Used in Capture Cell Techniques.- Some Remarks on the Density of Interplanetary Dust Grains.- A Coronascanner for a Sun Oriented Space Mission.- III. Interplanetary Dust: Laboratory Studies.- Collection of Cosmic Dust: Past and Future (IR).- Complementary Laboratory Measurements of Individual Interplanetary Dust Particles.- Proton Induced X-Ray Emission (PIXE) Analysis of Meteoritic Microsamples.- Physical Properties of Submicronic Carbonaceous Particles Candidate as Cosmic Dust.- A Discover of Iron Spherules with Golden Ni-Fe Core and Silicate Spherules with Golden Ni-Fe Inclusion in Deep-Sea Sediments.- 26Al/l0Be in Deep Sea Spherules as Evidence of Cometary Origin.- Chemical and Isotopic Compositions of Refractory Elements in Deep Sea Spherules.- Cosmic Ray Exposure Age Determinations of Cosmic Spherules from Marine Sediments.- Cosmic Spherules, Asteroid Collisions and the Solar Constant.- Observation of high 3He/4He Ratio in Ocean Sediments — Evidence for Extraterrestrial Material Contamination.- Cometary Dust and the Periodicity of Rainfall Singularities.- IV. Optical Studies of Dust.- Laboratory Investigations and Optical Properties of Grains (IR).- Remote Sensing of the Zodiacal Cloud along Secants to Earth’s Orbit (IC).- A Method for Deriving the Mean Volume Scattering Phase Function for Zodiacal Dust.- Microwave and Laser Facilities to Determine Scattering and Colour Signatures Related to the Physical Properties of Dust Particles.- Experimental Results on Scattering by Irregular and Meteoritic Dust Particles Related to Photopolarimetry of Zodiacal Light and Comets.- Laboratory Results on Polarization Properties of Elongated Particles and Comparisons to Dust in the Tail of Comet IKEYA-SEKI (1965 VIII).- Preliminary Results of a Dust Scattering Experiment.- nfluence of Surface Roughness on Scattering Patterns.- Zodiacal Light and the Spatial Density of Interplanetary Grains.- Optical Properties of Rough Grains: A Theoretical Study.- Wavelength Dependence of the Zodiacal Light.- Optical Models of the Three Dimensional Distribution of Interplanetary Dust.- Equilibrium Temperatures of H2O,CO2 and NH3 Ice Grains in the Solar System.- The Optical Properties of Circumstellar and Interstellar Dust in the Mid-IR.- Laboratory Infrared Transmission Measurements of Interplanetary Dust and Implications for Remote Observations of Cosmic Particles.- Plans for Release of Simulated Interplanetary Materials Into Low Earth Orbit.- V. Relations to Comets and Meteoroids.- On the Bimodal Nature of the Particle-Size-Distribution Function of Cometary Dust.- On the Dynamic Behaviour of Dust Striae Observed in Comets West 1976VI, and Mrkos 1957V.- Selection Effects Against Small Comets.- Optical Detection of Large Meteoroids in Space.- Meteoroid Orbits Determined by Southern Hemisphere Radar.- VI. Dust — Plasma Interactions.- Dust — Plasma — Gas Interactions in the Heliosphere (IR).- Interaction of the Cometary Dust with the Solar Wind and Cometary Plasma.- Optical and Photoelectric Properties of Materials of Astrophysical Interest.- Electrostatic Charge of Interplanetary Dust Grains: New Results.- On the Electrical Effects of the Presence of Fluff on the Surface of Cosmic Dust Grains.- Secondary Emission from Interplanetary Dust Grains.- Computer Calculation of Collision Cascades by Energetic Particles Penetrating Dust Grains.- Laboratory Simulation of Chemical Interactions of Accelerated Ions with Dust and Ice Grains.- On Two Mechanisms of X-Ray Generation in Comets.- VII. Dynamics of Interplanetary Dust.- Dynamics and Spatial Distribution of Interplanetary Dust.- The Gravitational Zones of Influence of the Planets Acting on Small Celestial Bodies.- A New Approach to Evaluate Planetary Perturbations on a Cloud of Dust in Low Eccentricity Heliocentric Orbits.- Planetary Perturbations: Effects of the Shape of a Cloud of Dust in Circular Heliocentric Orbits.- Dynamics of Dust Particles in the Solar System.- An Analysis of IRAS’ Solar System Dust Bands.- Mass Input into and Output from the Meteoritic Complex.- Lorentz Scattering of Interplanetary Dust Grains.- Possible Distributions of some Orbital Elements of Interstellar Particles in the Solar System.- IR = Invited Review.- IC = Invited Contribution.- Final Discussion.- Summary and Conclusion of the Colloquium.- Index of Authors.- Index of Subjects.