---
title: "LLNL scientists simulate nuclear strike on asteroid: 3D simulations show how an explosion shatters a celestial body"
description: "LLNL researchers performed 3D simulations of a nuclear explosion near a 160-meter asteroid, showing that X-ray radiation evaporates and shatters the body, while debris disperses into space without threatening Earth."
date: 2026-10-20T16:25:13.100Z
lang: en
url: https://xab.info/en/posts/llnl-scientists-simulate-nuclear-strike-asteroid
tags: [asteroid-defense, nuclear-explosion, llnl, planetary-protection, space-simulation, dart-mission]
author: "Alexander Buran"
publisher: "XAB.info"
---

# LLNL scientists simulate nuclear strike on asteroid: 3D simulations show how an explosion shatters a celestial body

![3D simulation of a nuclear strike on a space asteroid near Earth](https://xab.info/media/2026/10/20/uchenye-llnl-smodelirovali-yadernyi-udar-po-asteroidu/uchenye-llnl-smodelirovali-yadernyi-udar-po-asteroidu-1.webp)

## Key Points

- LLNL researchers created 3D simulations of a nuclear explosion near a 160-meter asteroid using the Spheral code
- X-ray radiation from the detonation causes evaporation and fragmentation of the celestial body
- Asteroid fragments acquire sufficient velocity after the explosion to disperse into open space
- The nuclear option is viewed as a last resort when a kinetic impactor (like the DART mission) is ineffective

Researchers at the Lawrence Livermore National Laboratory (LLNL) have presented a series of three-dimensional simulations demonstrating how a nuclear explosion could alter the trajectory of or completely destroy a potentially hazardous asteroid. The work, reported by RBC-Ukraine with reference to Interesting Engineering, has become one of the most detailed numerical experiments in the field of planetary defense and provides international organizations with specific mathematical tools for decision-making in extreme scenarios.

### From kinetic impactor to the nuclear option

Unlike most global threats, an asteroid collision can be prevented if it is detected early enough. In 2022, NASA already demonstrated the effectiveness of a kinetic impactor: the DART mission probe intentionally crashed into the asteroid Dimorphos and changed its orbit. However, to stop giant bodies or in conditions where only months remain before a potential impact, the energy of a conventional spacecraft is insufficient. It is within this 'window' that a nuclear charge, capable of delivering orders of magnitude more energy to the object, is considered a last resort, yet physically viable measure.

### Methodology: from 1,500 calculations to volumetric models

To evaluate the realism of the nuclear scenario, LLNL astrophysicists utilized the specialized Spheral computational code. Before moving to three-dimensional simulations, the team compared more than 1,500 one-dimensional calculations with data from the verified Ares model. Only after confirming the accuracy of the algorithm did the researchers proceed to volumetric 3D models that took into account body geometry, rock density, and radiation parameters.

### What happens during detonation: evaporation and fragmentation

During the experiment, scientists simulated a detonation near a complexly shaped asteroid 160 meters in diameter. The simulations varied the distance to the detonation site and the density of the rock itself. X-ray radiation from the explosion leads to the rapid evaporation of the upper layers of the body, and the subsequent vapor pressure causes fragmentation—the asteroid breaks apart into numerous fragments that scatter in different directions.

### Main conclusion: no 'stone rain'

The key result of the study is that after detonation, the asteroid fragments acquire sufficient velocity to disperse into open space. None of the fragments retain a trajectory directed toward Earth, which rules out the scenario of a massive 'stone rain' upon the planet's surface. The resulting 3D models, as intended by the authors, will allow international planetary defense organizations to calculate in advance how, where, and with what yield a nuclear charge should be applied if the planet is genuinely threatened by a cosmic catastrophe.

### Context and prospects

The LLNL study fits into a broader program of preparation for hypothetical threats from near-Earth objects. Although the probability of a large asteroid colliding with Earth in the coming decades is assessed as extremely low, having verified numerical models and refined detonation protocols reduces uncertainty at the moment when decisions must be made under tight deadlines. The work emphasizes that the nuclear option remains not a 'Plan B', but the final echelon of defense, resorted to only when kinetic and gravitational methods are exhausted.

## Fact-Check & Sources

- [Крайняя мера: почему ученые планируют ядерный удар по астероиду](https://www.rbc.ua/ukr/news/krayniy-zahid-chomu-vcheni-planuyut-derniy-1792505811.html) - The primary source contains all key facts: Spheral/Ares methodology, 160 m asteroid parameters, debris dispersion conclusion, context of the 2022 DART mission. Reference to Interesting Engineering as the original source of the study.

## FAQ

### What exactly did LLNL scientists simulate?

Researchers created three-dimensional simulations of a nuclear explosion near a complexly shaped asteroid 160 meters in diameter, varying the detonation distance and rock density. They used the specialized Spheral code, validated against 1,500+ one-dimensional calculations using the Ares model.

### Why is a nuclear strike considered a last resort?

A kinetic impactor, like the 2022 DART mission, is effective when an asteroid is detected early. But for giant bodies or when only months remain before impact, spacecraft energy is insufficient, and a nuclear charge delivers orders of magnitude more energy to the object.

### Will the asteroid turn into a 'stone rain' after the explosion?

According to the simulation results, fragments acquire enough speed to disperse into open space. No fragment maintains a trajectory toward Earth, ruling out a scenario of massive debris falling.

### When and how will the nuclear option be applied?

The resulting 3D models are intended for international planetary defense organizations. They allow calculating in advance the parameters (location, yield, distance) for applying a charge in case of a real collision threat.