  It has been hypothesized that advanced technological civilizations will
construct giant space colonies and supporting infrastructures to orbit about
their home stars. With data from recent satellites that operate at infrared and
optical wavelengths (Spitzer, WISE, TESS, Kepler), in company with a few modest
assumptions, it is now possible to begin to constrain observationally the
frequency of such space-based civilizations in our Milky Way Galaxy.
