 It matters how far you are off the Earth. The ISS and the Chinese space station are not at risk as much as if they were in high Earth orbit. Is that correct? The way to think about it, the farther you are from the ground, the more damage. Yes, exactly. And then eventually, if you get far enough, you're just outside the Van Allen belt. So if you go to the moon, you've lost that protection and obviously Mars as well.