Simulating Nuclear Defense Against Near-Earth Asteroids

Astrophysicist Isaiah Santistevan and his team utilized 3D models based on the structure of the asteroid Bennu to test how X-ray energy from a nuclear device might disrupt a celestial threat. By detonating a weapon mere meters from the surface, the resulting X-ray pulse triggers rapid vaporization of rock, creating a jet of escaping material that acts as a physical propellant to shift the asteroid's path or cause internal shock waves that fracture the body.

In tests comparing detonations at 10 and 25 meters, the team found that the further distance allowed X-rays to distribute across a broader surface area, causing more widespread damage within milliseconds. Despite these results, the computational intensity remains a hurdle; a single 145-millisecond simulation required 59 days of processing time across 1,680 processors. Consequently, researchers remain cautious about long-term outcomes, noting that gravitational forces could potentially pull fragments back together or leave large, dangerous debris in Earth's vicinity. The study, published in The Planetary Science Journal, serves as a foundational assessment rather than a definitive protocol for asteroid mitigation.