Facts About Bennu
Bennu is a carbon-rich asteroid that is about one-third of a mile wide at its equator.
Bennu may have broken off from a much larger carbon-rich asteroid about 700 million to 2 billion years ago. It likely formed in the main asteroid belt between Mars and Jupiter, and has drifted much closer to Earth since then. Bennu makes it closest approach to Earth every 6 years, coming within about 186,000 miles (299,000 kilometers) of our planet.
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Bennu was the target of NASA's first asteroid sample return mission – OSIRIS-REx.
NASA's OSIRIS-REx spacecraft launched to Bennu on Sept. 8, 2016, to collect a sample. After is successfully delivered the sample to Earth on Sept. 24, 2023, the OSIRIS-REx Sample Analysis Team found that Bennu contains the original ingredients that formed our solar system. The sample also had a few surprises.
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