NASA's OSIRIS-REx Mission: Bennu Asteroid Sample Contains Carbon, Water

NASA's OSIRIS-REx Mission: Bennu Asteroid Sample Contains Carbon, Water

A view of the outside of the OSIRIS-REx sample collector. Sample material from asteroid Bennu can be seen on the middle right. Scientists have found evidence of both carbon and water in initial analysis of this material. The bulk of the sample is located inside.

A view inside a glass and stainless steel glovebox containing the OSIRIS-REx asteroid sample return canister.

Asteroid particles coat the base of the OSIRIS-REx science canister.

Astromaterials processor Mari Montoya and OSIRIS-REx curation team members set the TAGSAM (Touch and Go Sample Acquisition Mechanism) down in the canister glovebox after removing it from the canister base and flipping it over.

Astromaterials processors Mari Montoya, left, and Curtis Calva, right, use tools to collect asteroid particles from the base of the OSIRIS-REx science canister.  

Sample material from asteroid Bennu

Initial studies of the 4.5-billion-year-old asteroid Bennu sample collected in space and brought to Earth by NASA show evidence of high-carbon content and water, which together could indicate the building blocks of life on Earth may be found in the rock. NASA made the news Wednesday, Oct. 11, 2023, from its Johnson Space Center in Houston where leadership and scientists showed off the asteroid material for the first time since it landed in September.

This finding was part of a preliminary assessment of NASA’s OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification and Security – Regolith Explorer) science team.

Although more work is needed to understand the nature of the carbon compounds found, the initial discovery bodes well for future analyses of the asteroid sample. The secrets held within the rocks and dust from the asteroid will be studied for decades to come, offering insights into how our solar system was formed, how the precursor materials to life may have been seeded on Earth, and what precautions need to be taken to avoid asteroid collisions with our home planet.

Bonus sample material

The goal of the OSIRIS-REx sample collection was 60 grams of asteroid material. Curation experts at NASA Johnson, working in new clean rooms built especially for the mission, have spent 10 days so far carefully disassembling the sample return hardware to obtain a glimpse at the bulk sample within. When the science canister lid was first opened, scientists discovered bonus asteroid material covering the outside of the collector head, canister lid, and base. There was so much extra material it slowed down the careful process of collecting and containing the primary sample.

Within the first two weeks, scientists performed “quick-look” analyses of that initial material, collecting images from a scanning electron microscope, infrared measurements, X-ray diffraction, and chemical element analysis. X-ray computed tomography was also used to produce a 3D computer model of one of the particles, highlighting its diverse interior. This early glimpse provided the evidence of abundant carbon and water in the sample.

“As we peer into the ancient secrets preserved within the dust and rocks of asteroid Bennu, we are unlocking a time capsule that offers us profound insights into the origins of our solar system,” said Dante Lauretta, OSIRIS-REx principal investigator, University of Arizona, Tucson. “The bounty of carbon-rich material and the abundant presence of water-bearing clay minerals are just the tip of the cosmic iceberg. These discoveries, made possible through years of dedicated collaboration and cutting-edge science, propel us on a journey to understand not only our celestial neighborhood but also the potential for life’s beginnings. With each revelation from Bennu, we draw closer to unraveling the mysteries of our cosmic heritage.”

For the next two years, the mission’s science team will continue characterizing the samples and conduct the analysis needed to meet the mission’s science goals. NASA will preserve at least 70% of the sample at Johnson for further research by scientists worldwide, including future generations of scientists. As part of OSIRIS-REx’s science program, a cohort of more than 200 scientists around the world will explore the regolith’s properties, including researchers from many U.S. institutions, NASA partners Japan Aerospace Exploration Agency (JAXA), Canadian Space Agency (CSA), and other scientists from around the world. Additional samples will also be loaned later this fall to the Smithsonian Institution, Space Center Houston, and the University of Arizona for public display.

NASA’s Goddard Space Flight Center in Greenbelt, Maryland, provides overall mission management, systems engineering, and the safety and mission assurance for OSIRIS-REx. Lauretta, the principal investigator, leads the science team and the mission’s science observation planning and data processing. Lockheed Martin Space in Littleton, Colorado, built the spacecraft, provided flight operations, and was responsible for capsule recovery. Goddard and KinetX Aerospace were responsible for navigating the OSIRIS-REx spacecraft.

Find more information about NASA’s OSIRIS-REx mission at:

https://www.nasa.gov/osiris-rex

University of Arizona's OSIRIS-REx Mission Page: http://www.asteroidmission.org

Image Credit: NASA/Erika Blumenfeld, Joseph Aebersold, Dante Lauretta

Story Credit: Abbey A. Donaldson

Release Date: Oct. 11, 2023

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