Which critical component in modern astronomical telescope manufacturing has caused the most significant supply chain disruptions in the past decade due to its limited production sources?

The astronomy industry relies on complex supply chains to deliver state-of-the-art telescopes, satellites, and other observational equipment to research facilities worldwide. Manufacturing precision instruments that can detect light from billions of years ago requires specialized materials and components sourced from around the globe. Test your knowledge about the intricate supply chain behind modern astronomical discoveries!

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Ultra-low expansion glass for primary mirrors
Digital sensor arrays
Adaptive optics actuators
Titanium telescope mountings