ship of fools

Venus is the hottest planet in the solar system.

It's hotter than Mercury, which is much closer to the Sun than Venus. Why is this so? 90 atmospheres of carbon dioxide coat Venus' surface, keeping the temperature on the surface at an even 864 degrees Fahrenheit, or 462 degrees Celsius. Compare this with practically-no-atmosphere Mercury at only 800 degrees Fahrenheit during the day.