The Forward Optical Assembly of the Nancy Grace Roman Space Telescope includes a wide ring at the bottom containing the primary mirror.
Credit: Chris Gunn/NASA
The National Reconnaissance Office transferred surplus spy satellite optical assemblies to NASA in 2012, providing a critical component for what became the Nancy Grace Roman Space Telescope. The donation included a 7.9-ft. primary mirror—the same size as the Hubble Space Telescope’s and similar to...
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