Get out of the way: The 1st restartable solid rocket fuel could help reduce space junk

In the 2013 movie "Gravity," space junk nearly killed Sandra Bullock. While that story was most definitely fiction (and sensational fiction at that), the threat of space junk is real — so real that NASA has a whole office devoted to tracking and mitigating it. And last year marked the first international conference focused entirely on orbital debris. There's good reason to be concerned. Currently, about 2,000 operational satellites orbit the Earth — not to mention another 3,000 non-operational ones — and that number is expected to skyrocket. This year, more than 1,500 satellites are scheduled for launch. (Compare this to 2018, when only 365 were launched.) More

(Source: Space.com - Apr 28)