A pyramid‑sized asteroid can release energy comparable to thousands of nuclear bombs even when it moves slower than a rifle bullet. The key quantity is kinetic energy, which depends on both mass and velocity. A bullet has high speed but tiny mass. An asteroid has modest speed but enormous mass.
Impact physics treats this using the formula for kinetic energy: one half times mass times velocity squared. Multiply even a moderate velocity by a colossal mass and the result is a staggering energy budget. When the asteroid slams into the atmosphere and surface, that stored energy converts almost instantly into heat, shock waves and mechanical fragmentation.
The air in front of the asteroid compresses and heats, creating an intense fireball and a high‑pressure blast wave. Rock at the impact site behaves more like a fluid than a solid under this extreme energy density, excavating a crater and vaporizing material. Compared with a nuclear detonation, there is no fission chain reaction or radioactive fallout, but the raw kinetic energy release can match or exceed the explosive yield of thousands of warheads.
