Which manufacturing innovation revolutionized the supply chain for large astronomy telescope mirrors in the early 2000s?

The astronomy industry relies on complex supply chains to create the advanced equipment needed for stargazing and research. From raw materials to finished products, the journey of telescope components spans continents and involves cutting-edge manufacturing processes. Test your knowledge about how the tools that help us explore the cosmos actually reach astronomers and enthusiasts worldwide!

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Spin casting technology allowing mirrors to be formed in rotating ovens
3D printing of ultra-thin glass sheets that are later fused together
Diamond-tipped robotic polishing systems imported from Swiss watchmakers
Zero-gravity manufacturing processes developed aboard the International Space Station