This is a forum for discussion about current issues, unsolved problems and challenges of stellar, interstellar and planetary physics and related problems. The format consists of a general presentation of a particular topic, followed by a series of specialized seminars and "ad hoc" meetings of people interested in particular aspects of such problems. The main goal is to promote the cooperation among ICE scientists, to increase the scientific background of PhD students and to foster the scientific discussion. It is open to everybody interested on such topics