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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

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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
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  • 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

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  • 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

NASA positive on next planet-hunting mission launch

The spacecraft will be looking for a phenomenon known as a transit, where a planet passes in front of its star, causing a periodic and regular dip in the star's brightness

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NASA to release two missions focused on moon soon in 2022. Pixabay
NASA positive about next planet-hunting mission. Pixabay

Meteorologists with the US Air Force 45th Space Wing have predicted an 80 per cent chance of favourable weather for SpaceX Falcon 9 rocket’s launch with NASA’s Transiting Exoplanet Survey Satellite aimed at detecting planets outside our solar system.

ISS is a permanent base for astronauts stationed in the outer sky. Wikimedia Commons
This mission has NASA very positive. Wikimedia Commons

The launch is scheduled for Sunday at 6.32 p.m. (4.02 a.m. on Monday, India time) on a SpaceX Falcon 9 rocket from Space Launch Complex 40 at Cape Canaveral Air Force Station in Florida. The primary weather concern for the launch day are strong winds, NASA said in a statement late Saturday. The survey, also known as Tess, is NASA’s next step in the search for exoplanets, including those that could support life.

Once in orbit, Tess will spend about two years surveying 200,000 of the brightest stars near the Sun to search for planets outside our solar system. Tess will find the most promising exoplanets orbiting relatively nearby stars, giving future researchers a rich set of new targets for more comprehensive follow-up studies, including the potential to assess their capacity to harbour life.

Also Read: NASA sending first-ever mission to study Mars’ deep interior

With the help of a gravitational assist from the Moon, the spacecraft will settle into a 13.7-day orbit around Earth, NASA said in an earlier statement. Sixty days after the launch and following tests of its instruments, the satellite will begin its initial two-year mission. Four wide-field cameras will give Tess a field-of-view that covers 85 per cent of our entire sky.

NASA Kepler spaceship will be used.

Within this vast visual perspective, the sky has been divided into 26 sectors that Tess will observe one by one. The first year of observations will map the 13 sectors encompassing the southern sky, and the second year will map the 13 sectors of the northern sky.

The spacecraft will be looking for a phenomenon known as a transit, where a planet passes in front of its star, causing a periodic and regular dip in the star’s brightness. NASA’s Kepler spacecraft used the same method to spot more than 2,600 confirmed exoplanets, most of them orbiting faint stars 300 to 3,000 light-years away. IANS