Images by Cassini showed no evidence of any darkening of the rings by impacting micrometeoroids — space rock particles smaller than a grain of sand — prompting scientists to conclude the rings ...

Over time, micrometeoroids — rocks smaller than a grain of sand hurtling through space — would have slammed into the bright icy particles making up Saturn's rings. The level of dirt seen on ...

Images by Cassini showed no evidence of any darkening of the rings by impacting micrometeoroids — space rock particles smaller than a grain of sand — prompting scientists to conclude the rings ...

That thin layer of atoms, which begins at the lunar surface and extends 100 kilometers (60 miles) into space, exists mostly because small micrometeoroids strike the surface, vaporizing atoms and ...

Images by Cassini showed no evidence of any darkening of the rings by impacting micrometeoroids — space rock particles smaller than a grain of sand — prompting scientists to conclude the rings ...

Images by Cassini showed no evidence of any darkening of the rings by impacting micrometeoroids — space rock particles smaller than a grain of sand — prompting scientists to conclude the rings ...