Some of the dust particles present in the solar system are likely to be agg
regates. The study of polarization of the light scattered by such aggregate
d particles is performed for the six main formation processes. The analysis
of the results shows that an irregular and fluffy structure of the particl
es allows a better understanding of the light scattering observations. (C)
2000 Academie des sciences/Editions scientifiques et medicales Elsevier SAS
.