Scientists just opened the lid to NASA’s asteroid sample canister

Enlarge / The lid is open on the OSIRIS-REx sample return canister, revealing a tantalizing ring of dust outside the main sample collection chamber. (credit: Dante Lauretta)

Dante Lauretta, a planetary scientist at the University of Arizona, has waited nearly 20 years to get his hands on pristine specimens from an asteroid, which he says is a key to unlocking answers to mysteries about the origin of life on Earth. On Tuesday, he got his first look at dust grains returned by NASA’s OSIRIS-REx mission.

Because they want to be sure, members of the OSIRIS-REx science team will wipe some of the dust from the asteroid sample canister and send it to a laboratory for analysis. But there’s little question the dust grains visible immediately after scientists opened the lid to the canister are from asteroid Bennu, where the OSIRIS-REx spacecraft captured rocks during a touch-and-go landing in 2020.

The spacecraft completed its round-trip journey to asteroid Bennu with a near-bullseye landing of its sample return capsule Sunday morning in Utah. The OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer) mothership released the capsule to plunge into the atmosphere while it fired its thrusters to maneuver on a trajectory to head back into the Solar System for an extended mission to visit another asteroid.