With Webb Telescope's Mid-Booms Extended, Sunshield Takes Shape

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The so-far-so-good dept was posted by EditorDavid on Saturday January 1, 2022.

NASA said that the sun shield "now resembles its full, kite-shaped form in space" after it was extended. The sun shield was kept safe and folded prior to deployment with the help of the 178 non-explosive actuators in Webb.

The deployment took longer than expected due to the operations team moving forward with caution and according to the protocols they laid out for dealing with unpredictable situations.

The arms are locked in their final position. The team will hold the sun shield in their proper place as they tense it up. In the coming days, the team will separate and then individually tension each of the five sun shield layers, stretching them into their final shape. The space between the membranes will allow heat to escape and make each layer of the sun shield cooler than the one below. Sun shield tensioning will take at least two days but may take longer due to the complexity of the process and the flexibility built into the timeline.

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The sun shield operation is shown in a video. "This is the largest and most complex JWST event that has never been attempted in space," writes Slashdot reader necro 81. After this, the telescope's operating temperature can be adjusted to detect the cold light needed to detect the warm light.