In May 2021, a hole was found in a robotic arm aboard the International Space Station (ISS). The suspected culprit was a piece of rogue space junk. While thankfully no astronauts were injured, it has re-focussed attention on the growing problem of orbital debris...How did we get here?..It’s easy to forget that just seven decades ago the Moonwas the only thing orbiting the Earth. On 1 January 2021 therewere 6,542 satellites in orbit. Tellingly, only just over half ofthem were active. That’s a lot of useless metal careering aroundthe planet at 28,000 kph — ten times faster than a bullet....How bad is the problem?..Very bad and getting worse. Estimates suggest there arecurrently half a million pieces of debris the size of a marble orlarger and 100 million pieces of debris above one millimeteracross. Yet only 27,000 pieces are actively tracked by the USDepartment of Defense...What is Kessler syndrome?..It’s a catastrophic chain of events in which a satellite isshattered by a piece of space junk (or a collision with anothersatellite) and the resulting debris destroys more satellites creatingmore junk and so on in a never-ending cascade. It’s a dominoeffect – one piece falls and then takes the rest with it – and isnamed after NASA scientist Donald Kessler, who outlined thedangers back in 1978....What can we do about it?..Better regulation of new launches would help, as rightnow it’s a bit of a free-for-all. There are existing regulations inplace to try and mitigate the dangers, such as a 25-year de-orbitrule for missions in low-Earth orbit. However, ESA’s SpaceDebris Environment Report says that less than 60 per cent ofthose flying in low-Earth orbit currently stick to the rules....Colin Stuart. Space Junk: Is it a disaster waiting to happen?Internet: (adapted)....Considering the text above, judge the following items. The word “Yet” (third paragraph) acts as an indicator of time.

The word “Yet” (third paragraph) acts as an indicator of ...

Q2244484

The word “Yet” (third paragraph) acts as an indicator of time.

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