Atmosphere of Earth surface. The refractive index of air depends on temperature, giving rise to refraction effects when the temperature gradient is large. An example of such effects is the mirage. "Atmospheric circulation" is the large-scale movement of air through the troposphere, and the means (with ocean circulation) by which heat is distributed around Earth. The large-scale structure of the atmospheric circulation varies from year to year, but the basic structure remains fairly constant because it is determined by Earth's rotation rate and the difference in solar radiation between the equator and poles. The first atmosphere consisted of gases in the solar nebula,
Opus: The Day We Found Earth Opus: The Day We Found Earth Opus: The Day We Found Earth (stylized as OPUS: The Day We Found Earth) is an adventure game focused on story and exploration, developed by SIGONO (originally Team Signal), an independent game developer from Taiwan. It was first released on iOS and Android on October 22, 2015. A PC port was later released on Steam, available for Microsoft Windows and Mac OS X users. The game was nominated for Best Meaningful Play at the 12th International Mobile Gaming Awards on February 16, 2016. "OPUS: The Day We Found Earth" is an exploration adventure game