Slow down and speed up for satellites
Small Finnish company Aurora Propulsion Technologies is testing a radical new satellite de-orbiting technology this summer. The plasma brake technology was invented by astrophysicist Pekka Janhunen, one of the company founders. The plasma brake is compact, lightweight, and relatively inexpensive. About the size of an old-style cassette tape, it can be installed on a satellite before launch, although in the future it may be possible to retrofit them to satellites of up to 600kg using a robotic arm mounted on another space vehicle. De-orbiting satellites safely is critical to mitigate the generation of space junk by collisions between orbiting objects. A plasma brake unit that can safely de-orbit satellites from orbits up to 1,000km in altitude would weigh only 2kg and cost a fraction of…