How does Earths atmosphere compare to the atmospheres of Mars and Venus?
Venus is the other extreme of conditions. While Mars’ atmosphere is cold and rarified, Venus’ is hot and dense. The same net result is the absence of liquid water or vapor transport. Also the same is the predominance of carbon dioxide, with much less nitrogen than Earth. The temperature and pressure of Venus are much greater than Earth : the surface pressure is 92 times as great, and temperatures average 460°C (770° F). The atmospere is highly efficient at heat transfer, so there are few places on the surface more than a few degrees cooler. The only “rain” is droplets of sulfuric acid in high Venusian clouds of sulfur dioxide.
