Dusty Objects in the Universe: Proceedings of the Fourth International Workshop of the Astronomical Observatory of Capodimonte (OAC 4), Held at Capri, Italy, September 8¿13, 1989

Solid matter in space is crucial in accounting for many processes. In these last years a great improvement of the general knowledge of the problem has been possible due to the increase, in number and quality, of observations and of the laboratory efforts to simulate "cosmic" dust. Theoreticians have also given their contribution in solving some questions and in posing others. Continuing an effort started in 1987, the Astrophysical Groups operating in Naples th th have considered it useful to organize a Workshop in Capri from September 8 to 13 1989 in order to assess the state of the art in such an interesting field as that of "Dusty Objects in the Universe". The subject is, obviously, too wide to be discussed in detail. However, the presence of many experts in different areas provided an updated general picture. Laboratory work has been reviewed, as well as recent observations and theoretical interpretations which concern processes occurring in our Galaxy and in external galaxies. The Workshop gave to participants the unique opportunity of exchanging ideas and of discussing on different themes. In addition, the meeting has been enriched by the presentation of the major technological projects related to ongoing airborne and space mlSSlons. the aim of giving the state of the art about specific Invited papers were prepared with subjects; contributed papers and some selected poster papers presented, on the contrary, the various fields.