Definition: The "aeropause" in astronomy refers to a region where the Earth's atmosphere begins to thin out, much like the outer layer of the skin can be thinner than the inside as we age. - Definition: The term "aeropause" comes from Greek, and is related to the concept of a gap or line separating the lower atmosphere (which includes the ionosphere and some of the stratosphere) from the upper atmosphere. This gap separates two phases of Earth's atmosphere; the cooler, denser lower atmosphere called troposphere, which extends downward from the surface towards the poles, and the warmer, less dense upper atmosphere known as stratosphere. - The "aeropause" can be defined in its various layers: 1.

Upper Atmosphere

: This is composed of fine dust particles suspended in a gas phase. 2.

Troposphere

: A thin layer at the Earth's equator, between 60 and 45 kilometers (37 and 28 miles) above the surface. 3.

Stratosphere

: This is composed of gases that are very warm and dense compared to the troposphere. 4.

Lower Atmosphere

: These particles are lighter than the stratospheric gases but still have sufficient energy to continue their motion. In summary, "aeropause" refers to a point where the temperature of Earth's upper atmosphere is below the surrounding surface. This boundary separates the troposphere from the lower and the stratosphere from the upper atmospheric layers.

aeropause