But that's the entire point -- fragments of space junk can be the sizes of pebbles you're talking about.
Cosmic dust, on the other hand, is just dust. It can be abrasive but satellites are designed to handle it, as is the ISS. It may have high velocity but the fact that its mass is miniscule means it can be shielded against.
Cosmic dust, on the other hand, is just dust. It can be abrasive but satellites are designed to handle it, as is the ISS. It may have high velocity but the fact that its mass is miniscule means it can be shielded against.