Why scooping an asteroid sample is harder than it looks

The sampler head of the OSIRIS-REx spacecraft works not unlike a reverse vacuum cleaner, designed to collect loose material from the surface of asteroid Bennu on Oct. 20. Credit: .NASA/Goddard Space Flight Center When NASA’s OSIRIS-REx spacecraft descends toward the surface of Bennu on Oct. 20, it will be the first time that a U.S.-led […]