OSIRIS's the name of three entirely separate astronomical instruments. The duplication of names's coincidental, partly driven by two scientific teams trying to make acronyms using similar words. OH-Suppressing Infrared Integral Field Spectrograph OSIRIS (OH-Suppressing Infrared Integral Field Spectrograph)'s an integral field spectrograph for the Keck II telescope in Hawaii. As an integral field spectrograph, it can obtain many spectra simultaneously covering a small region of the sky. As such,… (More on Osiris)