June 15, 2026, 5:55 PM EDTBy Denise ChowGREENBELT, Md. — When visiting a $4.3 billion space telescope, cleanliness is paramount. Entering the clean room where NASA built its Nancy Grace Roman Space Telescope requires an eight-step process in three separate rooms to clean you from hair to shoes. The agency has spared no effort to keep its next-generation observatory free from earthly contamination ahead of a planned launch in August. Just a moment.We are getting your experience ready.
Inside the highly restricted room where NASA built its next-generation space telescope
The Nancy Grace Roman Space Telescope is designed to capture sweeping images at a rapid pace. Its success depends on keeping earthly contamination at bay.
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