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We present some of the initial results from the HST Medium Deep Survey (Key Project) using WFPC2 in cycle 4. WFPC2 has been used in parallel mode for the survey at the rate of a few fields every week since late January 1994, where each field is typically covered by several 30-40 minute "orbits", with exposures split between "wide V" (F606W) and "wide I" (F814W). The extragalactic part of ther Medium Deep Survey is directed towards an understanding of galaxy morphology at intermediate redshifts (0.1 to 0.7), with systematic ground-based spectroscopic and photometric follow-up.
Some of the initial WFPC2 images show evidence for compact, superluminous starburst regions within galaxies. We also detect a high fraction of disturbed and interacting systems, and estimates are made of these fractions relative to local galaxies.
We are performing a search for serendipitous objects, and present images of candidate lensing systems and merging/interacting galaxies.
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