Sample Return

Asteroid Sample Return Missions Are Critical For Understanding Our Solar System

By Keith Cowing
Status Report
Nature via PubMed
May 24, 2026
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Asteroid Sample Return Missions Are Critical For Understanding Our Solar System
Canister containing material collected from asteroid Bennu placed inside the OSIRIS-REx sample return capsule. Credit: NASA/GSFC/Univ. of Arizona/Lockheed Martin

Studying asteroids addresses a number of unknowns in planetary science. Investigating them makes use of asteroidal meteorites, remote observations and space-based missions.

However, to fully investigate these objects, analysis of pristine asteroid material in Earth-based laboratories is necessary. This requires missions which travel to an asteroid and return samples to Earth.

The Hayabusa, Hayabusa2 and OSIRIS-REx sample return missions have showcased the criticality of having asteroid material in hand. Returned samples exhibit fragile mineralogy which does not survive meteorite fall, and is too small to be identified via remote sensing.

These missions paved the way for the deployment of future missions including sample return from the Martian moon Phobos, and visiting Psyche – the remanent core of a differentiated body. The study of asteroids, and particularly asteroid sample return, is necessary for the next generation of discoveries.

Astrobiology, Astrochemistry, Astrogeology,

Biologist, Explorers Club Fellow, ex-NASA Space Biologist and Payload integrator, Editor of NASAWatch.com and Astrobiology.com, Lapsed climber, Explorer, Synaesthete, Former Challenger Center board member 🖖🏻