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how can space junk cause damage to spacecraft and how we can solve this problem ?

#space #junk #damage #spacecraft
In
space
, even the tiniest
objects
 can cause immense harm. To stay in low-Earth orbit, an object would typically be travelling at a whopping 27,000kph. At that speed, even just a stray bolt or broken bit of solar panel could punch a hole through the metal casing or the delicate inner circuitry of a working satellite.
Space
 may be big—really big—but, as humans find new reasons to launch ever more
satellites
 ever more cheaply, the bit of it just beyond the Earth’s atmosphere is getting busy. That small region of
space
 is estimated to contain 34,000
objects
 more than 10cm across and almost 130m that are smaller than that. Using radar to
track
 “
space
junk
” has hitherto been the preserve of governments. Actually, mostly one government: America’s. NASA, in collaboration with the US Department of Defence, keeps
track
 of 27,000
objects
 with a diameter of around 10cm or more.
Space
 Fence, a new system built for America’s air force, makes 2m observations a day, many of closely spaced
objects
 that are just 5cm across. But now, as we explore in the Science section
this
 week, companies are getting involved. LeoLabs, an American company, has multiple radar sites around the world and can
track
objects
 slightly bigger than tennis balls (ie, 7cm or so across). The company sells its data to anyone who wants to know quickly how likely their newly launched satellite is to collide with some dangerous
junk
.
Space
junk
 can
also
 be tracked by arrays of cheap cameras that take pictures of the night sky every few seconds, or by systems that can bounce lasers off bits of debris.
Although
 some of these newer methods might be less precise, they can
also
 work out much cheaper. The future could involve tracking
junk
 from
space
 itself. Northstar Earth &
Space
, based in Montreal, wants to launch up to a dozen
satellites
 that use telescopic cameras to
track
junk
 from Earth orbit. Thinking about
space
junk
 has never been more urgent. There are more than 6,000
satellites
 orbiting our planet today, around 60% of which are already defunct. In the coming decade, it’s estimated that almost 1,000 will be launched every year—so that by 2028, there could be 15,000 in orbit. The plans of SpaceX, OneWeb, Amazon and others to launch thousands of
satellites
 in the coming years, in a bid to provide high-speed internet access around the world, will only accelerate the crowding of
space
 around Earth.
Submitted by tanat30635.ts on

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