Thermosphere gas and the ionospheric plasma. The International Space Station orbits the Earth within the middle of the thermosphere, between . It is convenient to separate the atmospheric regions according to the two temperature minima at about 12 km altitude (the tropopause) and at about 85 km (the mesopause) (Figure 1). The thermosphere (or the upper atmosphere) is the height region above 85 km, while the region between the tropopause and the mesopause is the middle atmosphere (stratosphere and mesosphere) where absorption of solar UV radiation generates the temperature maximum near 45 km altitude and causes the ozone layer. The density
Triangle of the Sun Triangle of the Sun The Triangle of the Sun is a tourist area in the state of Guerrero that runs through the Sierra Madre del Sur of that state. This tourist area is formed by the cities of Acapulco in the south, the pair of Ixtapa-Zihuatanejo in the north, and Taxco in the center of the state. These cities are those that receive more tourists in Guerrero. Acapulco is the largest port city and populous state of Guerrero and the most visited by tourists and internacionales. This destination got its fame from the 50's and 70's also becoming a favorite