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Space & Astronomy

Scientists to zap space debris with lasers

March 12, 2014 | Comment icon 19 comments



The Earth is surrounded by space junk. Image Credit: NASA
A team of Australian physicists have come up with a new way to deal with the ever-growing field of junk.
Satellites and spacecraft are already running a daily gauntlet of spent rocket stages, screws, bolts and other objects that currently encircle our world. As time goes on the problem will reach the point at which it will be too risky to send anything else up in to space due to the risk of a collision.

To help combat this problem a team of scientists from Australia has developed a new system that uses powerful lasers to target and zap individual items of debris so that they fall back down and burn up harmlessly in the atmosphere.
The team hopes to have a working system running within the next ten years so that they can begin to tackle the estimated 300,000 pieces of space junk currently in orbit.

"It's important that it's possible on that scale because there's so much space junk up there," said Matthew Colless, director of Australian National University's Research School of Astronomy and Astrophysics. "We're perhaps only a couple of decades away from a catastrophic cascade of collisions... that takes out all the satellites in low orbit."

Source: The Guardian | Comments (19)


Recent comments on this story
Comment icon #10 Posted by Ashyne 9 years ago
Why zap one piece of debris at a time when you can use a net to collect a huge amount at once?
Comment icon #11 Posted by JustTerri 9 years ago
Wow that's a lot of junk!
Comment icon #12 Posted by Calibeliever 9 years ago
Why zap one piece of debris at a time when you can use a net to collect a huge amount at once? Not a bad thought except I imagine the relative speed of some of these objects might make that a bit tricky. Even a small object traveling at several thousand miles an hour can pack quite a punch. You'd have to match your trajectory to each one you were tracking and I'm guessing they aren't all moving about in a uniform way. That would have to be one strong net.
Comment icon #13 Posted by Hawkin 9 years ago
This gives a whole new meaning to Skeet Shooting.
Comment icon #14 Posted by alfonso 9 years ago
if that pictures for real , a wouldnt like to think id be flying round in the ISS or anything to mars through all that ... ***SNIP***
Comment icon #15 Posted by Peter B 9 years ago
if that pictures for real , a wouldnt like to think id be flying round in the ISS or anything to mars through all that ***SNIP*** Is it actually necessary to say that the picture is not real? The number and location of the satellites is probably close to the mark, but they are not that big. At that scale they would be 100 kilometres or so across, instead of their actual size of a few metres.
Comment icon #16 Posted by Ashyne 9 years ago
Not a bad thought except I imagine the relative speed of some of these objects might make that a bit tricky. Even a small object traveling at several thousand miles an hour can pack quite a punch. You'd have to match your trajectory to each one you were tracking and I'm guessing they aren't all moving about in a uniform way. That would have to be one strong net. The net would be hundreds of kilometers wide on each side. Japan has such a net planned, as an article posted here recently mentioned.
Comment icon #17 Posted by Waspie_Dwarf 9 years ago
Why zap one piece of debris at a time when you can use a net to collect a huge amount at once? Why limit yourself to only one method? The net would be hundreds of kilometers wide on each side. Japan has such a net planned, as an article posted here recently mentioned. It seems to me that such a net is going to need to be constantly manoeuvred in order for it to avoid functioning satellites. If it malfunctions in orbit it will, itself, become the biggest piece of space junk, and the biggest single threat to functioning satellites in history. If a ground based laser fails then it simply stops wo... [More]
Comment icon #18 Posted by :PsYKoTiC:BeHAvIoR: 9 years ago
I'd go mad with power if I was the one handling lasers to clean out debris. "IMMA FIRIN' MAH LAZOR!"
Comment icon #19 Posted by Calibeliever 9 years ago
I'd go mad with power if I was the one handling lasers to clean out debris. "IMMA FIRIN' MAH LAZOR!"


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