MOONS can be easily broken down into two main sections: the part that is mechanically attached to the telescope and couples the light into the optical fibers and then the static spectrograph wherein the light from the fibers is dispersed and recorded. MOONS differs from many of other large multi-object spectrographs as it is mounted on the telescope’s Nasmyth port as opposed to sitting at its prime focus.

The figure below gives a brief overview of the technical design, while much more information on the two main sections of the Rotating Front End and the Spectrograph to be found in the relevant pages.