![]() The planet is also an oddball among its solar system brethren save one: of the planets that circle our Sun, only Venus and Uranus rotate retrograde, or backwards relative to the direction of their orbits around the Sun. Not only is the ground a gloomy, hazy place, it’s also akin to standing a full mile (1.6 kilometers) under the ocean on Earth, thanks to the immense pressure exerted by the planet’s heavier atmosphere. Beneath sulfuric acid clouds, the planet experiences the greenhouse effect gone wild, with surface temperatures climbing above 880 degrees Fahrenheit (470 degrees Celsius). Venus is enshrouded by a thick atmosphere of carbon dioxide. But our so-called sister planet is a harsh, unforgiving place where even our hardiest spacecraft haven’t survived more than a few hours on the surface before experiencing complete system failure. It lies slightly closer to the Sun (0.7 versus 1 AU), with a similar volume and density to our home. The planet Venus is just 1.1 times smaller than Earth.
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