Explore Earth's atmospheric layers from troposphere to exosphere.
Troposphere (0–12 km): Weather, 75% of atmospheric mass. Stratosphere (12–50 km): Ozone layer, jets fly here. Mesosphere (50–80 km): Meteors burn up. Thermosphere (80–700 km): Aurora, ISS orbits, very hot but sparse. Exosphere (700+ km): Fades into space. Temperature and pressure vary dramatically with altitude.