These lectures cover the principles of remote sensing instrumentation as commonly used for missions to solar system bodies. From the basic physical principles, an introduction to real instruments is provided. Particular attention is paid to the airborne visible infrared imaging spectrometer (AVIRIS) hyperspectral imager, Cassini-visual and infrared mapping spectrometer (VIMS) and the visible and infrared thermal imaging spectrometer (VIRTIS) series. We conclude with a review of the in situ science provided by landers, rovers and other surface elements.