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ESA Hera Asteroid Impact Investigation
ESA's Hera spacecraft arrives at the Didymos-Dimorphos system in November 2026, following up on NASA's DART impact that altered Dimorphos's orbit by 33 minutes. With a mass of 1,128 kilograms, Hera carries advanced instruments: a wide-angle camera, thermal infrared imager, and the PALT lidar altimeter, plus two CubeSats—Milani for mineral survey and Juventas for first-ever asteroid interior radar sounding. This mission costs 363 million euros, reflecting planetary defense's strategic value.
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