  We report spectroscopic observations of the earthshine reflected from the
Moon. By applying our photometry methodology to spectroscopy, we were able to
precisely determine the Earth's reflectance, and its variation as a function of
wavelength through a single night as the Earth rotates. These data imply that
planned regular monitoring of earthshine spectra will yield valuable, new
inputs for climate models, which would be complementary to those from the more
standard broadband measurements of satellite platforms. The mean spectroscopic
albedo over the visible is consistent with simultaneous broadband photometric
measurements. We found no evidence for an appreciable "red" or "vegetation
edge" in the Earth's spectral albedo, and no evidence for changes in this
spectral region (700 -740 nm) over the 40 degrees of Earth's rotation covered
by our observations.
