High Quality Content by WIKIPEDIA articles! The atmosphere of Venus is much denser and hotter than that of Earth. The temperature at the surface is 740 K (467°C, 872°F), while the pressure is 93 bar. The Venusian atmosphere supports opaque clouds made of sulfuric acid, making optical Earth-based and orbital observation of the surface impossible. Information about the topography has been obtained exclusively by radar imaging. The main atmospheric gases are carbon dioxide and nitrogen. Other chemical compounds are present only in trace amounts.