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Image description: NASA engineer Acey Herrera checks out copper test wires inside the thermal shield of the Mid-Infrared Instrument, known as MIRI, that will fly aboard NASA’s James Webb Space Telescope.
The shield is designed to protect the vital MIRI instrument from excess heat.
At the time of the photo, the thermal shield was about to go through rigorous environmental testing to ensure it can perform properly in the extreme cold temperatures that it will encounter in space. Learn more about the tests.
Photo from NASA.

Image description: NASA engineer Acey Herrera checks out copper test wires inside the thermal shield of the Mid-Infrared Instrument, known as MIRI, that will fly aboard NASA’s James Webb Space Telescope.

The shield is designed to protect the vital MIRI instrument from excess heat.

At the time of the photo, the thermal shield was about to go through rigorous environmental testing to ensure it can perform properly in the extreme cold temperatures that it will encounter in space. Learn more about the tests.

Photo from NASA.