The most detailed pictures yet from the asteroid Ryugu show it has no dust, which is very strange. There are at least three competing possible explanations
Source:
https://www.newscientist.com/article/2214235-asteroid-ryugu-has-no-dust-on-it-and-we-dont-know-why/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home