Ciekawostka, laserowym sprzataniem zainteresowali sie tez powaznie australijczycy.
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Adam Przybyla
Metoda laserowa może generować dodatkowe śmieci
Cleaning up our space junkyardFebruary 8, 2018 at 10:42 am
Shooting down debris with space lasersOne of the most sci-fi solutions could also be one of the most viable – use lasers to steer or shoot down the debris.
A large array of ground-based or space-based lasers could be trained on the target piece of debris, and fired to vaporise the surface of the side facing the lasers. Rather than destroying the debris, the vaporised side would actually act like a weak rocket engine, pushing the debris to a new orbit, or de-orbit it completely.
However as straightforward as it sounds, vaporising bits of debris might lead to other problems.
As small specks of material are blasted off the debris by the lasers, they would add to the volume of microscopic space junk already up there and, like the paint flecks, do a lot of damage to other spacecraft.
A spinning target also has its own complications. If the target is spinning fast enough, then the small thrust from the vaporisation will send the debris on the wrong course.
There are also some very Earth-based political concerns to this approach. One worry is whether high powered lasers designed for debris removal could also be used as weapons. Space-based lasers are currently illegal because of international treaties banning weapons in space, while ground-based and airborne lasers raise concerns about arms control.
An alternative would be to reduce the power of the lasers and just use the pressure of the light to slowly nudge the debris. This requires only about one thousandth of the power needed to vaporise bits of space junk, but it would greatly reduce how quickly the lasers could change the orbit of the debris.
Because of this, a low-power laser would not clean up space junk, but merely focus on slowly moving specific targets to safer orbits, while requiring stations around the world to work together to have a useful effect.
As the space junk would only be within range of one station for a few minutes, the stations would need to take it in turns to nudge a piece of junk, focusing on one piece while the other stations aim at other targets as they come in to view.
Slow and inefficient it may be, but politically more palatable.
https://australiascience.tv/cleaning-up-our-space-junkyard/