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Other factors being equal, planetary temperature (measured on an absolute scale e.g. Kelvin) falls with the square root of distance from the sun. With a semi-major axis of 0.723 AU, we would expect Venus to have an average planetary temperature about 1/0.85 that of Earth’s 288 K: 339 K or about 66°C or 150°F. Since surface temperature is largely regulated ...


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It couldn't stay at L1 for longer than a few months. The electrochromic material's degradation due to ultraviolet radiation would limit how long the panels would operate. On Earth, outdoors, at sea level, they would last at most "a few years." Earth's atmosphere blocks 77% of UV, so the UV just outside Earth's atmosphere is 4.3 times stronger. Venus is ...


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