Space debris is a constant threat to astronauts, satellites, space stations, and billionaire tourists. Gonzalo Sánchez and his colleagues of the E.T. PACK Project have come up with an approach that can be used to deorbit satellites in the future.
The ESA's Space Debris Office estimates that there are over 34,000 pieces of large debris in Low Earth Orbit consisting of dead satellites, boosters, dropped wrenches, paint flecks and all manner of other assorted junk. At some difficult to predict point in the future it is possible, as the amount of this debris increases, for a cascading effect known as the Kessler syndrome to occur making Low Earth Orbit extremely dangerous and effectively closing it off for use.
The new satellite deorbiting technology is intended to help avoid this outcome and is called the Electrodynamic Tether technology for Passive Consumable-less deorbit Kit (E.T.PACK) system.
The key to this system is a low work-function tether that consists of a strip of aluminum tape coated with a special material that allows it to emit electrons when illuminated by the Sun. This causes the tether to become attracted to Earth's magnetic field via the Lorentz Force, effectively lowering its altitude until it burns up in Earth's atmosphere.
The tether itself would measure 2 cm (0.8 in) in width, 50 microns in thickness, and several kilometers in length. During the launch of the satellite, the tether would be rolled up in a reel and only deployed once the satellite was in orbit. In this way, future satellites would be able to self-destruct and not become part of the space debris problem.
The project, which is funded by the European Commissions is expected to conclude in three years culminating in a prototype for a demonstration flight. The technology has captured the interest of the ESA and various space industries.
(Score: 1) by fustakrakich on Sunday June 16 2019, @05:59PM (2 children)
Aluminum, as everyone knows, is attracted... to a Magnet.
It is, eh? I think that's just another one of *your*, er... fibs, yeah, that's it...
Or to put it another way, Aluminum is about as magnetic as *you* are. Of course I mean that in the nicest possible way, right?
La politica e i criminali sono la stessa cosa..
(Score: 1, Troll) by realDonaldTrump on Monday June 17 2019, @01:01AM (1 child)
Obviously I was being sarcastic. Although, not as sarcastic as you might think.
Look at Summary. Did you even look at Summary? They say, tether is "attracted to Earth's magnetic field." Another way of saying, Earth is a HUGE MAGNET. And, it attracts Tether (Aluminum). Sounds like a lie, right? Youre on a Fake News Sight. They lie about Magnet. They lie about Vaccine. They lie about Microsoft. And, they lie about me!!!!
(Score: 0) by Anonymous Coward on Monday June 17 2019, @01:23AM
Where is the Woosh mod?