Asteroid Bennu's Surprising Surface Revealed by NASA Spacecraft

Near-Earth asteroid Bennu is a rubble pile of rocks and
boulders left over from the formation of the solar
system. On October 20, 2020, NASA's 0SIRIS-REx
spacecraft briefly touched down on Bennu and
collected a sample for return to Earth. During this
"TAG event," the spacecraft's arm sank far deeper into
the asteroid than expected, confirming that Bennu's
surface is incredibly weak. Now, scientists have used
data from OSIRIS-REx to revisit the TAG event and
better understand how Bennu's loose upper layers are
held together.