James Webb Space Telescope Successfully Deploys Major Components

The James Webb Space Telescope has successfully unfurled its tennis court-sized sunshield and secondary mirror.

Wednesday, January 05, 2022 at 03:05 PM ET

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The James Webb Space Telescope’s sunshield, seen here during its final deployment test on Earth in December 2020 at Northrop Grumman in Redondo Beach, California. The five-layer, tennis court-sized sunshield is essential for protecting the telescope from heat, allowing Webb’s instruments to cool down to the extremely low temperatures necessary to carry out its science goals. [Photo: NASA/Chris Gunn]

Key Takeaways:

The James Webb Space Telescope has successfully completed major deployments, including its tennis court-sized sunshield and secondary mirror, a critical eight-day process.
The sunshield is vital for maintaining the telescope's operational temperature of approximately minus 370 degrees Fahrenheit by reflecting heat from the sun, moon, and Earth.
The next key step involves unfolding the telescope's 18 gold-coated primary mirrors, after which it will undergo months of cooling before it is ready to send images back to Earth.

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The James Webb Space Telescope has successfully unfurled its tennis court-sized sunshield and secondary mirror—a process that took eight days to complete—NASA confirmed on Tuesday.

Nearing the completion of its deployment, Webb successfully unfolded its secondary mirror—another important checkpoint for NASA’s mission. The secondary mirror serves as the centerpoint for Webb’s iconic gold-coated primary mirrors.