[meteorite-list] Ceres' Bright Spots Seen in Striking New Detail

[Greg B.]

There is now a very close up high resolution of the bright spots in one 
of the craters. Why are we still
in the dark as to the composition of the bright material?  Does NASA 
have a spectrometer on the craft. If so why can't they determine what 
the white substance is composed of. If they do not have a spectrometer 
on the craft.
..what were they thinking!!
Greg B.