Uh oh, There's a Problem With one of Webb's Science Instruments - by kuingul
James Webb is currently experiencing problems with its MIRI instrument. The problem is due to increased friction in one of MIRI’s mechanisms in the Medium-Resolution Spectroscopy mode. The observatory is otherwise healthy, but the team decided to stop observations using MRS mode until they find a solution.
JWST’s Mid-Infrared Instrument is one of the most important instruments onboard. It allows the telescope to see in the wavelength range from 5 to 27 micrometers. The instrument has 4 modes: imaging, medium-resolution spectroscopy, low-resolution spectroscopy, and coronagraphy. On August 24 during preparation for observations using MIRI’s medium-resolution spectroscopy mode the team detected a problem with a grating wheel. Its function is to select between short, medium and longer wavelengths. During the setup process leading to scientific observation, the telescope detected increased friction in the mechanism, which caused the issue.
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