👉 Nimbostratus is a term used in astronomy and astrophysics to describe the layer of clouds that forms above the Earth's atmosphere. This layer, called the stratosphere, is composed primarily of nitrogen and oxygen, and it plays an important role in regulating the temperature and pressure inside the Earth's atmosphere. The nimbostratus cloud layer can be found at high altitudes, particularly near the poles, and its presence indicates a high level of atmospheric instability or turbulence.