Summary

NASA has completed its final inspection of the primary mirror on the Roman Space Telescope, which measures 2.4 meters (7.9 feet) in diameter and contains a layer of silver hundreds of times thinner than a human hair, at 400 nanometers. The primary mirror will help accomplish Roman's mission objectives using near-infrared light , including studying dark matter and dark energy, discovering exoplanets through direct imaging and gravitational microlensing, and examining galaxy formation, evolution and star populations.

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