The asteroid, which is being studied by NASA’s OSIRIS-REx, shows some surprising activity on its surface, and scientists are beginning to understand what might be causing it.
When NASA’s OSIRIS-REx spacecraft arrived at asteroid (101955) Bennu, mission scientists knew that their spacecraft was orbiting something special. Not only was the boulder-strewn asteroid shaped like a rough diamond, its surface was crackling with activity, shedding small pieces of rock into space. Now, after more than a year and a half up close with Bennu, they’re starting to better understand these dynamic particle-ejection events.
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