Mercury is closer to the Sun, but Venus is the hottest planet, at about 465°C (870°F) everywhere on its surface. We explain how its thick carbon dioxide atmosphere causes a runaway greenhouse effect, why Earth's "twin" turned out so differently, and some of its strangest features: it spins backward, and its day is longer than its year. We also cover the Venera landers and the missions planned next.This episode includes AI-generated content.
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More from Our Solar System
Why Does Uranus Spin on Its Side?
What Is the Asteroid Belt, and Why Didn't It Become a Planet?
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