James Webb is almost ready to start work. Now, the Mid-Infrared instrument (MIRI) has completed its checks and NASA has announced that it is ready for science.
The countdown is on for the release of the first science images from the James Webb Space Telescope, scheduled for July 12. But before full science operations begin, each of Webb’s four instruments has to be calibrated and checked in its various modes to ensure it’s ready to collect data. This week, the Mid-Infrared instrument has completed its checks and NASA has announced that it is ready for science.
Unlike Webb’s other three instruments which operate in the near-infrared range, MIRI operates in the mid-infrared which means it has some peculiarities. It was the last instrument to reach its operating temperature because its silicon detectors have to be so cold to work — at a temperature of less than 7 degrees Kelvin. In order to control its temperature exactly, the MIRI instrument has both a heater and a cooler.
“We are thrilled that MIRI is now a functioning, state-of-the-art instrument with performances across all its capabilities better than expected,” said MIRI European principal investigator Gillian Wright and MIRI science lead George Rieke in a statement. “Our multinational commissioning team has done a fantastic job getting MIRI ready in the space of just a few weeks.
You can track the progress of James Webb getting its four instruments ready for their seventeen modes on the James Webb tracker on NASA’s website. Currently, sixteen of the modes are ready for science, with just the coronagraphy mode of the NIRCam instrument left to be signed off. Once this is done, Webb will be ready for science operations, looking at exoplanet atmospheres, finding some of the earliest galaxies in the universe, and much more.
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