Donnerstag, 29. Juni 2017

Supercomputer Simulation of Chelyabinsk-like Asteroid Entering Earth’s Atmosphere

This simulation shows a cross-section of a Chelyabinsk-like asteroid (gray) breaking up during atmospheric entry at 45,000 mph (20 km per second). A hot, high-pressure shock wave (red, orange, yellow) forms around the asteroid, causing it to fracture and flatten like a pancake. Aerodynamic instabilities shed waves of material from the surface and tear the asteroid apart. The dispersed fragments (black) deposit most of the energy into the atmosphere within a relatively short distance, creating dangerous blast waves and thermal radiation on the ground. 

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