Mid-Infrared Instrument Operations Update The James Webb Space Telescope’s Mid-Infrared Instrument (MIRI) has four observing modes. During setup for a science observation on August 24, a mechanism that supports one of these modes, known as medium-resolution spectroscopy (MRS), exhibited what appear
. During setup for a science observation on August 24, a mechanism that supports one of these modes, known as medium-resolution spectroscopy , exhibited what appears to be increased friction. This mechanism is a grating wheel that allows astronomers to select between short, medium, and longer wavelengths when making observations using the MRS mode.
The Mid-InfraRed Instrument of the James Webb Space Telescope sees light in the mid-infrared region of the electromagnetic spectrum, at wavelengths that are longer than our eyes can see. To pack all these modes in a single instrument, engineers have designed an intricate optical system in which light coming from Webb’s telescope follows a complex 3D path before finally reaching MIRI’s detectors.
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