👉 In astrophysics, a thermosphere is a layer of gas that is primarily composed of hydrogen and helium, extending from about 10 to 30 million kilometers above Earth's surface. It forms an important part of the atmosphere around planets in our solar system, including Mars, Venus, Jupiter, Saturn, Uranus, and Neptune. The thermosphere plays a crucial role in the planet's climate by providing the necessary conditions for life as we know it. The layers of this gas are
