Could be done, but why? Most of the point and shoot have a limited exposure range say 1/125 to 1/60 sec so would limit objects to planets/ moon. The webcam would be a better solution, as you can collect multiple frames and add them. The webcam CCD size for planets is OK.
For DSO's you need exposures in the high seconds if not minutes on as large a CCD as you get get.
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