Atmosphere of Earth and balloons, and too low to permit orbital spacecraft. The mesosphere is mainly accessed by sounding rockets and rocket-powered aircraft. The stratosphere is the second-lowest layer of Earth's atmosphere. It lies above the troposphere and is separated from it by the tropopause. This layer extends from the top of the troposphere at roughly above Earth's surface to the stratopause at an altitude of about . The atmospheric pressure at the top of the stratosphere is roughly 1/1000 the pressure at sea level. It contains the ozone layer, which is the part of Earth's atmosphere that contains relatively high concentrations of
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