Lab-based proof-of-concept shows how radiation creates explosive plumes to deflect menacing space rocks
US scientists have demonstrated that potentially dangerous asteroids destined for Earth could be deflected from their trajectory using X-rays.
While the risk of asteroid strikes to life on Earth are well documented – RIP dinosaurs – the human race's ability to do anything about it is uncertain. Proposals such as NASA's Double Asteroid Redirection Test mission involve a spacecraft meeting and altering the trajectory of a threatening asteroid. The problem with that approach is the time taken to prepare such a mission, as well as the cost.
The data collected from the test provided input to numerical simulations designed to demonstrate how the X-ray pulse method might deflect and how the deflection might scale, suggesting that an asteroid close enough to Earth about four kilometers across could be shoved off its path using the strategy.
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