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Loading contentESA's planetary-defense mission to the Didymos–Dimorphos binary, launched in 2024 to survey the aftermath of NASA's DART impact in detail.
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How Hera connects across Asteria Star — scientific, cultural, and astrological links are kept separate.
A near-Earth binary asteroid whose small moon, Dimorphos, was struck by NASA's DART in 2022 — humanity's first test of asteroid deflection.
The small moon of the near-Earth asteroid Didymos and the impact target of NASA's DART mission — the first object whose orbit humans deliberately changed. ESA's Hera will survey the aftermath.
A spacecraft that enters orbit around a small body to map it globally over time — NEAR at Eros, Dawn at Vesta and Ceres, Rosetta at comet 67P.
A spacecraft that matches a small body's orbit and stays with it for an extended study, rather than flying past. Rendezvous enables detailed mapping and, often, orbiting or landing.
Falcon 9 is a partially reusable two-stage orbital launch vehicle developed and operated by SpaceX.
The Asteroid Impact and Deflection Assessment — an international collaboration to test and characterise asteroid deflection at the Didymos–Dimorphos binary. NASA's DART performed the kinetic impact in 2022; ESA's Hera will survey the result in detail, together turning a one-off experiment into a repeatable, well-understood technique.
The European Space Agency's global network of ground tracking stations that communicates with ESA's Earth-orbiting and deep-space missions.
Determining what an object is — its size, shape, spin, and composition — from light curves, radar, spectra, and, for a few, spacecraft visits. Hera is en route to survey the asteroid DART struck, to learn how a deflection actually worked.
Crashing a spacecraft into an asteroid at high speed to nudge its orbit — and getting an extra push from the plume of debris thrown off. NASA's DART did exactly this to the moonlet Dimorphos in 2022, measurably shortening its orbit; ESA's Hera is on its way to study the result up close, arriving in late 2026.
A NASA mission at the Sun–Earth L1 point that measures the solar wind and energetic particles upstream of Earth, giving roughly an hour of warning before disturbances reach the planet.
ESA's Asteroid Impact Mission — the original European orbiter half of the AIDA collaboration, meant to observe the DART impact in real time. It was not funded in 2016, but its science was largely revived and reshaped as the Hera mission.
Apollo 11 was the NASA mission that in July 1969 first landed humans on the Moon, with Neil Armstrong and Buzz Aldrin walking on the lunar surface.
Apollo 13's planned lunar landing was aborted after an oxygen-tank explosion; the crew returned safely in a celebrated rescue.
Apollo 17 was the final crewed Apollo lunar landing, carrying the first scientist-astronaut to the Moon.
Apollo 8 was the first crewed mission to leave Earth orbit and orbit the Moon, returning the famous 'Earthrise' photograph.
Facts on this topic will be cited from these primary and reference sources.
European missions, observatories, and space science imagery.