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Hera spacecraft in front of the binary asteroids Didymos and Dimorphos: The Hera spacecraft will study the binary asteroids Didymos and Dimorphos in 2026 for six months to determine exactly how the orbital periods and shapes of the asteroids have changed since the impact of NASA's DART probe in 2022. Hera is equipped with twelve measuring instruments for this purpose. The most important are the two Asteroid Framing Cameras – two redundant, monochromatic cameras – which are used to determine the spacecraft's position in the asteroid system. They are essential for the probe's navigation. Hera also carries two CubeSats, Juventas and Milani, each the size of a shoebox. They will move closer to Dimorphos and, in the final phase of the mission, even land on it to measure its surface, internal structure, and gravity.
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Mission Hera: Europe prepares for asteroid defense

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