Ionosphere

The part of the atmosphere that is ionized by solar radiation stretches from 50 to 1,000 km (31 to 620 mi) and typically overlaps both the exosphere and the thermosphere. It plays an important part in atmospheric electricity and forms the inner edge of the magnetosphere. Because of it's charged particles, it has practical importance because it influences, for example, radio propagation on the Earth. It is responsible for auroras( a natural electrical phenomenon that looks like streams of reddish or greenish light in the sky. Found near the North or the south pole)