PLANETARY SCIENCE A weak and active surface of Bennu

The surface of the asteroid Bennu is so weakly bonded that rockslide avalanches are easily triggered by small body impacts, and boulders fractured due to diurnal heating and cooling are readily dislodged. The result is a surface under continuous renewal.

Automated summary

The surface of asteroid Bennu is easily affected by small body impacts and diurnal heating and cooling, leading to continuous renewal.