  Empirical studies of the first generation of stars and quasars in the
Universe will likely become feasible over the next decade. The Next Generation
Space Telescope will provide direct imaging and photometry of sub-galactic
objects at redshifts above z=10, while microwave anisotropy experiments, such
as MAP or Planck, will set constraints on the ionization history of the
intergalactic medium due to these sources. We describe the expected signals
that will be detectable with these future instruments.
