NASA Sounding Rocket Program
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FOXSI-5 planned for spring 2026
For a quarter century, one telescope has dominated X-ray astronomy: NASA's Chandra, a bus-sized, $1.65 billion observatory with mirrors 1.2 meters across. Now a team from Nagoya University and Japan's SPring-8 synchrotron has produced a single seamless nickel mirror just 60 millimeters wide that matches Chandra's core sharpness — resolving an object 3.5 millimeters wide from a kilometer away. The mirror flew on the FOXSI-4 sounding rocket in April 2024 and captured images of a solar flare.
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