Re: L2
"Most particles that hit objects in LEO (even at 400 miles) are man made debris. "
Hmm, how do you know this? It could be known, since you could examine the impact damage, but I'm wondering if this is true. Got a reference?
I know this is true for lower orbits. But at what point you would have more impacts from natural sources I'm not sure- but I would've guessed it was somewhere around Hubble's orbit.
