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S.J. Lilly (U. of Toronto)
The NGST will produce a revolution in our understanding of the Origin and Evolution of Galaxies at high redshifts. It will achieve this both by detecting forming galaxies at extremely high redshifts (in principle up to z ~ 30) and by producing very high quality quantitative data on galaxies in the 1 < z < 6 range through systematic diagnostic spectroscopy in th enear-infrared. Mid-infrared spectroscopy on NGST also holds the key to understanding highly obscured galaxies at high redshifts. New windows for our understanding of galaxy evolution will be opened from gravitational lensing and the detection of supernovae over a wide range of cosmic epochs. In this talk I will review the programs of observations that it is envisaged will be undertaken with the NGST in this area. I will also touch on how much of this science is likely to be done before the launch of the NGST.
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