Monday May 28, 2018
Home Lead Story Australia Dev...

Australia Developing Lasers to Track, Destroy Space Junk

But space debris does not have to be big to cause damage. A floating fleck of paint is thought to have cracked a window on the International Space Station

3
//
373
A meteor streaks across the sky in the early morning as people watching during the Perseid meteor shower in Ramon Carter near the town of Mitzpe Ramon, southern Israel, August 13, 2015. The Perseid meteor shower is sparked every August when the Earth passes through a stream of space debris left by comet Swift-Tuttle. VOA
A meteor streaks across the sky in the early morning as people watching during the Perseid meteor shower in Ramon Carter near the town of Mitzpe Ramon, southern Israel, August 13, 2015. The Perseid meteor shower is sparked every August when the Earth passes through a stream of space debris left by comet Swift-Tuttle. VOA
Republish
Reprint
  • Australian scientists are developing new kinds of lasers
  • These lasers will be used to destroy space junk
  • There is an estimated 7500 tons of junk in space

Australian scientists say a powerful ground-based laser targeting space junk will be ready for use next year. They say there are hundreds of thousands of pieces of debris circling the Earth that have the potential to damage or destroy satellites.

Reducing the amount of space junk in orbit has been the focus of a meeting of scientists this week in Canberra organized by Australia’s Space Environment Research Center.

Telescope can view stars at ultraviolet wavelengths unhindered. Wikimedia Commons
There is 7500 tons of junk in space. Wikimedia Commons

The meeting has heard that a laser using energy from light radiation to move discarded objects in space could be ready for use within a year. Researchers in Australia believe the technology would be able to change the path of orbital junk to prevent collisions with satellites. The aim is to eventually build more powerful laser beams that could push debris into the Earth’s atmosphere, where it would burn up. Professor Craig Smith, head of EOS Space Systems, the Australian company that is developing the junk-busting devices, explained how it would work.

Also Read: NASA’s Juno spacecraft detects “Monster” Cyclones on Jupiter’s Surface

“We track objects and predict collisions to high accuracy and if we think a space debris object is going to have a collision with another space debris object then we can use our laser to change its orbits rather than crashing into a satellite or another space debris object causing more space debris. Again as we ramp up the power to bigger and bigger lasers then, yes, you can actually start moving it enough to what we call de-orbit the satellite by reducing its velocity enough that it starts to change orbit height and eventually hits the atmosphere and the atmosphere takes over and drags it,” Smith said.

The system, which would operate through a telescope near the Australian capital, Canberra, is expected to be finished early next year. It is estimated there are 7,500 tons of trash in space. This includes an estimated half-a-million marble-sized pieces of junk, while other items, such as discarded rockets and disused parts of space crafts, are much larger.

Cosmic rays
The lasers will be used to destroy space junk. Pixabay

In 2012, the eight-ton Envisat Earth Observation satellite unexpectedly shut-down in orbit, where it remains. The size of a school bus, the satellite is one of the largest pieces of ‘junk’ in orbit and could become a catastrophic hazard if struck by other space debris and broken into fragments.

But space debris does not have to be big to cause damage. A floating fleck of paint is thought to have cracked a window on the International Space Station. In Europe, large nets and harpoons are being developed to catch debris encircling our planet. VOA

Click here for reuse options!
Copyright 2018 NewsGram

  • Monty

    And we want to colonise the rest of the universe. We can’t even keep our own planet in shape. What makes anyone think that man will be any different on Mars or elsewhere?

  • RickFromTexas

    Extremely bad idea, space junk is made of exotic metals and materials, where is what’s left after this junk is hit by lasers going to go? That’s right, gravity will attract it into the upper atmosphere where it will interact in unforeseen ways with what’s already there.

    It might wipe out the ozone layer or interact badly with cosmic rays and/or radiation and then the whole planet’s screwed, but the point is no one knows what will happen and it’s not likely to be good based on how we’ve affected the upper layers of the atmosphere in the past.

    • RickFromTexas

      And why is our first thought to destroy or blow up space junk, why don’t we just harvest it and recycle it? Ideas like this come from little men overcompensating for how nature shortchanged them in the manhood department. My laser’s bigger! I can just hear ’em now…

  • Monty

    And we want to colonise the rest of the universe. We can’t even keep our own planet in shape. What makes anyone think that man will be any different on Mars or elsewhere?

  • RickFromTexas

    Extremely bad idea, space junk is made of exotic metals and materials, where is what’s left after this junk is hit by lasers going to go? That’s right, gravity will attract it into the upper atmosphere where it will interact in unforeseen ways with what’s already there.

    It might wipe out the ozone layer or interact badly with cosmic rays and/or radiation and then the whole planet’s screwed, but the point is no one knows what will happen and it’s not likely to be good based on how we’ve affected the upper layers of the atmosphere in the past.

    • RickFromTexas

      And why is our first thought to destroy or blow up space junk, why don’t we just harvest it and recycle it? Ideas like this come from little men overcompensating for how nature shortchanged them in the manhood department. My laser’s bigger! I can just hear ’em now…

Next Story

More than 200 Commonwealth Games Athletes Seek Asylum in Australia and 50 Go Missing

More than 200 Commonwealth Games athletes and officials remain in Australia after applying for refugee visas, with another 50 staying in the country illegally.

0
//
12
indian athletes
wikimedia

More than 200 Commonwealth Games athletes and officials remain in Australia after applying for refugee visas, with another 50 staying in the country illegally.

The figures were revealed by Immigration Department officials to a Senate committee hearing on Monday night, reports Xinhua news agency.

A total of 8,103 athletes, media representatives and officials arrived in Australia on temporary visas for the Gold Coast event which concluded on April 15, with 7,848 returning home after their stay expired last week, meaning 255 stayed in the country.

Of those who have remained in Australia, 205 were legally in the community on bridging visas as they await approval to stay on a permanent basis. Border Force officials have commenced a nationwide search for the other 50 who have overstayed their visas.

The majority of foreigners seeking asylum in Australia were from war-torn African nations such as Sierra Leone, Ghana and Nigeria. However some members of the Indian and Pakistani teams have also remained in Australia.

Swimmers. Pixabay

Australia’s Department of Home Affairs deputy secretary, Malisa Golightly, told parliament on Monday night that most of the remaining participants “have applied for protection visas”.

“Anybody that is onshore can apply for protection legally once they are here, but of course then they are considered against … the criteria for that visa,” she said.

The temporary protection visas allow the Commonwealth Games participants to stay in Australia for up to three years and receive welfare benefits.

Peter Dutton, Australia’s Home Affairs Minister, said he was disappointed with the number of people who have stayed illegally as they had been welcomed to Australia “in good faith”.

“Australians hate being taken for a ride by freeloaders,” Dutton told Newscorp Australia on Monday night.

Also Read:Indians Among Top Asylum Seekers in the World: International Migration Outlook 2017 Report

“Australia is now obliged under international law to consider these protection visa applications.”

In comparison, only 45 people extended their visas or sought asylum in Australia after the 2006 Melbourne Commonwealth Games.

–IANS