The non-spinning section of Galileo carries instruments and other equipment whose operation depends on the ability to point in one direction steadily, and not to be spun or shaken around in any way. The instruments include the camera system, the near-infrared mapping spectrometer to make multispectral images for atmospheric and moon surface chemical analysis, the ultraviolet spectrometer to study gases, the photopolarimeter-radiometer to measure radiant and reflected energy, and a charge coupled device (CCD) sensor with a very sensitive broad colour detection band.