unsuitable for human habitation as Icarus would remind us. Mercury's surface temperatures are both extremely hot and cold. Because the planet is so close to t

unsuitable for human habitation as Icarus would remind us. Mercury's surface temperatures are both extremely hot and cold. Because the planet is so close to the Sun, day temperatures can reach highs of 800°F (430°C). Without an atmosphere to retain that heat at night, temperatures can dip as low as -290°F (-180°C). You could get sunburn while bathing in your budgie smugglers