Asteroid Bennu’s Rugged Surface Baffled NASA, We Finally Know Why

https://science.nasa.gov/missions/osiris-rex/asteroid-bennus-rugged-surface-baffled-nasa-we-finally-know-why/?utm_source=newsletter&utm_medium=email&utm_campaign=nn202611 Jagged, Rugged World In one of the biggest surprises of NASA's OSIRIS-REx mission, its target asteroid, Bennu, turned out to be a jagged, rugged world covered in large boulders, with few of the smooth patches that earlier observations from Earth-based instruments had indicated. Data collected by the spacecraft during its survey campaign at the asteroid suggested a possible explanation: the boulders could be much more porous than expected.