well, if you go back to 1978, donald cussler _ there?you go back to 1978, donald cussler from nasa came up. donald cusslerfrom nasa came up with what's known as the kessler syndrome, where he said if you have objects colliding — we had two big satellites collide in 2009, causing about 500 pieces of space junk. so he said, if we have space junk that collides with other space junk, that'll create more space junk, collides with other space junk, that'll create more spacejunk, then we get into a situation where we have so much space junk up there that probably a collision will be so great, we can't put satellites up there. ., , great, we can't put satellites up there. .,, , great, we can't put satellites up there. ., , ., great, we can't put satellites up there. , ., | great, we can't put satellites up there._ i think l great, we can't put satellites up there._ i think if there. please carry on. i think if we don't do _ there. please carry on. i think if we don't do something - there. please carry on. i think if we don't do something in i th