Superhero Physics: Why Atmospheric Reentry Heat Is Compression, Not Friction
Reentry heat is compression heating (not friction). Whether a superhero survives "falling from space" depends entirely on orbital velocity vs stationary drop — two completely different physics scenarios.
The question of whether Batman could survive falling from space exposes a common physics misconception: reentry heat comes from compression heating (see Atmospheric Reentry: Compression Heating, Not Friction) (air compressed faster than it can move aside creates a plasma shockwave at 1,600-8,000°C), not friction as popularly believed. This distinction matters for fictional scenarios: - Orbital velocity reentry (~7.8 km/s): extreme compression heating, unsurvivable without shielding - High-altitude non-orbital drop: negligible heating but requires pressure suit and oxygen - Vacuum exposure: 10-15 seconds of consciousness, 60-90 seconds survival limit, and no explosive decompression (skin contains internal pressure) Superhero stories often treat "falling from space" as a single scenario, but the physics depends entirely on whether the character has orbital velocity. A character dropped from a stationary platform at 100km altitude faces almost no heating — just a very long fall. A character deorbiting from the ISS faces plasma temperatures regardless of their durability.