OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer)
is a NASA
asteroid-study and sample-return mission. The mission’s primary goal is to obtain a sample of at least 60 g (2.1 oz) from 101955 Bennu, a carbonaceous near-Earth asteroid, and return the sample to Earth for a detailed analysis. The material returned is expected to enable scientists to learn more about the formation and evolution of the Solar System, its initial stages of planet formation, and the source of organic compounds that led to the formation of life on Earth.
OSIRIS-REx was launched on September 2016, flew past Earth a year later, and rendezvoused with Bennu in December 2018. On 20 October 2020, OSIRIS-REx touched down on Bennu and successfully collected a sample. OSIRIS-REx is expected to return with its sample to Earth on 24 September 2023.