![]() The temperatures and solar radiation that characterize this planet are most likely too extreme for organisms to adapt to. Mercury's environment is not conducive to life as we know it. Mercury is appropriately named for the swiftest of the ancient Roman gods. But Mercury is the fastest planet, zipping around the Sun every 88 Earth days. Without an atmosphere to retain that heat at night, temperatures can dip as low as -290☏ (-180☌).ĭespite its proximity to the Sun, Mercury is not the hottest planet in our solar system – that title belongs to nearby Venus, thanks to its dense atmosphere. Because the planet is so close to the Sun, day temperatures can reach highs of 800☏ (430☌). Mercury's surface temperatures are both extremely hot and cold. From the surface of Mercury, the Sun would appear more than three times as large as it does when viewed from Earth, and the sunlight would be as much as seven times brighter. ![]() ![]() The smallest planet in our solar system and nearest to the Sun, Mercury is only slightly larger than Earth's Moon. ![]()
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