Edmund Husserl (n.) poses questions about the relation of the knower and the known. Heidegger, in contrast, asks what sort of beings we are and how our being is bound up with the intelligibiility of the world.
Edmund Husserl (n.) is important, in a reactionary kind of way, as a culmination of the Cartesian tradition which thinks of man's relationship to the world in terms of subjects knowing objects.
Edmund Husserl (n.) is concerned with the way that the mind is always directed toward objects under some aspect; which is to say it sees something as a particular thing (say a table) and can have beliefs and desires about said thing.
Edmund Husserl (n.) is responsible for the idea not that when one is seeing a table, one is seeing something ‘as’ a table, and regardless of what the table really is, the very fact that one is seeing something ‘as’ a table is indubitable.
Edmund Husserl (n.) wrongly thought subjects directed toward objects was at the root of the condition of the possibility of our being able to encounter anything.