Definition
- Singular
The outermost layer of Earth's atmosphere, extending into space, where it gradually fades into the vacuum.
外氣層
The temperature within the exosphere varies depending on altitude.
外氣層中的溫度會隨著高度而變化。
In the exosphere, gas particles are extremely sparse, and atoms and molecules can escape into space.
在外氣層中，氣體粒子極為稀薄，原子和分子可以逃逸到太空中。
Scientists use space telescopes to study the composition of the exosphere.
科學家使用太空望遠鏡來研究外氣層的組成。