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PARIS, France - Humanity could use a nuclear bomb to deflect a massive, life-threatening asteroid hurtling towards Earth in the future, according to scientists who tested the theory in the laboratory by blasting X-rays at a marble-sized "mock asteroid".The biggest real-life test of our planetary defences was carried out in 2022, when NASA's fridge-sized DART spacecraft smashed into a 160-metre wide asteroid, successfully knocking it well off course.
The vaporising material then propelled the mock asteroid in the opposite direction, so that it effectively "turned into a rocket engine," Moore said.It reached speeds of 250 kilometres an hour, "about as fast as a high-speed train," he added.The test marked the first time that predictions about how X-rays would affect an asteroid had been confirmed, Moore said."It really proves this concept could work.
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