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Loading contentA spacecraft (or a deployed element) that touches down on a small body's surface — Philae on comet 67P, NEAR on Eros, and the touchdown sampling of Hayabusa and Hayabusa2.
Placing a spacecraft or lander onto the surface of a target body.
NASA's Near Earth Asteroid Rendezvous mission — the first spacecraft to orbit an asteroid (433 Eros) and, in an unplanned finale, the first to soft-land on one. It mapped Eros for a year before its controlled descent in 2001.
JAXA's pathfinding asteroid sample-return mission — the first spacecraft to land on an asteroid and return material to Earth. Despite a cascade of failures (reaction wheels, a fuel leak, an intermittent ion engine, and a lost lander), it recovered more than a thousand microscopic grains of the asteroid Itokawa.
ESA's landmark comet mission — the first to orbit a comet nucleus and, via its Philae lander, the first to soft-land on one. It escorted comet 67P/Churyumov–Gerasimenko through perihelion for two years before its own controlled descent to the surface in 2016.
JAXA's follow-up to Hayabusa — a far more capable mission to the carbonaceous asteroid Ryugu. It deployed rovers and a lander, fired a projectile to make an artificial crater and sample subsurface material, and returned 5.4 grams of pristine, water- and organic-bearing rock. The spacecraft is now on an extended mission to a small fast-rotating asteroid.
JAXA's planned mission to the moons of Mars — it will study Phobos and Deimos and return a sample of Phobos to Earth, testing whether the Martian moons are captured asteroids or debris from a giant impact.
Facts on this topic will be cited from these primary and reference sources.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.
European missions, observatories, and space science imagery.
Japanese missions (Hayabusa, Akatsuki) and space science.