Chinese scientists are planning to fire more than 20 rockets into space to divert an asteriod impact that might one day hit earth. China’s National Space Science Centre found in simulations that 23 Long March 5 rockets, which weigh 900 tonnes, hitting simultaneously could divert an asteriod from its original path by nearly 9,000 kilometres – 1.4 times the Earth’s radius. Similar initiative exist in Univted States. NASA is creating a huge nuclear spacecraft Hammer (Hypervelocity Asteroid Mitigation Mission for Emergency Response) which is aiming at blowing up the giant asteroid Bennu. The US plan is more expensive and would deliver more than 400 tonnes of deflectors, nearly twice as many as in the Chinese proposal, but with a flight time nearly a year shorter, to achieve similar results.
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