why venus is hotter than mercury though it is farther away from sun

Question

anonymous · Answer

Apparently Venus has a lot of CO2 in its atmosphere. This causes it to do an enhanced greenhouse effect. This then traps a lot of heat in the planet, making it very hot.

nirmalnema · Answer

Venus is hotter because of the runaway greenhouse effect. The atmosphere on Venus is so thick and heavy that it traps the solar energy that penetrates its clouds. (On Earth, carbon dioxide and other gases similarly trap some infrared radiation and can warm the planet.) Mercury gets hotter on the side facing the Sun, but radiates this heat back into space when the heated side rotates away from the Sun at night (each day and each night on Mercury are both about 88 Earth days long). Although Mercury is the closest planet to the sun, it is only the second hottest planet after Venus. Venus gets hotter as the thick carbon dioxide atmosphere holds the heat more effectively, while Mercury has no atmosphere.

jack1 · Answer

greenhouse effect, CO2 is a huge heat absorber