How many instruments are on board Cassini?
There are 12 instruments aboard Cassini, four of which, including UVIS, are optical remote-sensing instruments: The Ultraviolet Imaging Spectrograph (UVIS); The Visible and Infrared Mapping Spectrometer (VIMS); the Composite Infrared Spectrometer (CIRS) and the Imaging Science Subsystem (ISS), which includes both narrow- and wide-angle cameras. Each of these optical instruments captures images with a telescope, the difference being in what part of the light spectrum it selects and what it does with the data. There are six additional instruments aboard the Huygens probe.
