Comment Re:What about the Little Ice Age? (Score 2) 552
Here's a better example: Mercury, the planet closest to the sun, has a daytime temperature of 800+ degrees Fahrenheit (420+ C), and a night time temperature as cold as minus 270 degrees Fahrenheit (minus 170+ C).
Venus on the other hand, due to its blanket of CO2, is around 860 degrees Fahrenheit (460 degrees C), day or night, at the poles or at the equator.
Venus is nearly twice the distance from the sun as Mercury and receives only 25% of Mercury's solar irradiance. If the sun truly was the only main determinant of a planet's temperature, then the surface temperature of Venus shouldn't be hotter than Mercury's, nor should Venus's nighttime temperature be as high as its daytime temperature.