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Why Are there Holes in the James Webb Sunshield? (Explained by My Dad) - Smarter Every Day 270

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vent holes

Holes in the sunshield are for venting air trapped during launch. They are staggered so sunlight doesn't directly hit the telescope.

  • ๐Ÿ›ฐ๏ธ The sunshield's five layers unfold like origami to keep the telescope optics extremely cold.
  • ๐Ÿงฝ The material is Kapton, only one-thousandth of an inch thick, coated with aluminum.
  • ๐Ÿ“ Measurements are taken with laser scanners and trackers, referencing spheres placed in the clean room.
  • ๐Ÿ’จ Air conditioning is shut off during measurements to prevent vibrations from affecting the delicate Kapton layers.
  • ๐Ÿ“ The shape of the sunshield is critical for radiating heat away from the telescope's instruments.

A finger points towards two figures in white suits floating in a pinkish, translucent space, with a hint of a large, reflective surface behind them.