Nulling Interferometers for Space-based High-Contrast Visible Imaging and Measurement of Exoplanetary EnvironmentsHigh contrast astronomical imaging has progressed significantly in the past decade. Many of these techniques have been laboratory demonstrated to perform at contrast levels adequate for the detection of Solar System like planets and dust around nearby stars. None of them, however, have been demonstrated in space. The state of the art in high contrast imaging systems that have been built for space based observation, the environment best suited for