Thermosphere Pressure: Understanding the Atmospheric Extremes

The thermosphere is the hottest and outermost layer of Earth's atmosphere. It extends from the mesopause at about 85 km (53 mi) to the exosphere at about 600 km (373 mi). The pressure in the thermosphere is extremely low, ranging from about 1×10−7 pascal (1×10−10 atm) at the mesopause to about 1×10−14 pascal (1×10−17 atm) at the exosphere.