The asteroid hunters: how new technology will help save Earth from a catastrophic collision
The existential threat from a large meteor is real, but two next-generation telescopes are about to make us safer
On 4 September, an asteroid was spotted curving towards Earth. Astronomers quickly established that it would impact the planet in 10 hours’ time. The Philippines island of Luzon was in the line of fire, and there was nothing they could do about it but watch. Sure enough, at 16.39 UTC (17.39 in the UK), just as predicted, the space rock plunged into the world and burst into flames.
If you’re wondering why you’re still around to read this, it’s because that meteor was only a metre in length. Far too puny to cause any damage, the asteroid instead harmlessly ignited in the upper atmosphere, temporarily painting the sky in a blue-green streak of light. As it turns out, small asteroids hit the planet all the time. They’re nothing to worry about – but it doesn’t take a massive leap in size for one to become a threat.
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