For an asteroid, Ryugu has surprisingly little dust on its surface
The space rock may hide the fine debris inside larger rocks or eject it into space
![Ryugu](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2019/08/081919_lg_ryugu_feat.jpg?fit=1028%2C579&ssl=1)
Germany’s MASCOT probe took this photo just before landing on the asteroid Ryugu. The craft found a landscape of crumbly and jagged rocks, but not much actual dust.
R. Jaumann et al/Science 2019