Does the greenhouse effect trap heat Venus?
Yes - the atmosphere of Venus is 90 times more dense than that
on Earth and it is made of 96.5% of CO2 and a 3% of nitrogen.
Interestingly there is almost no water in the atmosphere of Venus.
Because water vapor is a lighter gas than CO2, water vapor and
other lighter gases would tend to rise and be swept away by the
solar wind. By comparison, the atmosphere of earth is about 70%
nitrogen, 29% oxygen and 1% other gases like argon, water vapor,
helium, nitrogen, and a smidgen of CO2 (about 0.04%).
On earth, most of the greenhouse effect is due to water vapor.
Water vapor causes between 36% and 66% of the greenhouse effect on
Earth for clear sky conditions and between 66% and 85% when
including clouds - depending on how cloudy an area is. The rest of
the greenhouse effect is attributed to methane, CO2, nitrous oxide,
Because of the denser atmosphere and the chemical composition
Venus experiences an intense green-house effect that raises the
temperature over the surface to more than 470ºC. Clouds are common
on Earth but they completely cover Venus' atmosphere. They are made
of sulfuric acid droplets at 50-70 km above the surface and at
temperatures comparable to Earth's surface temperatures. Once solar
energy penetrates the clouds, they act like a blanket to keep the
heat in. You see the same phenomena on earth where cloudy winter
nights tend to be warmer than winter nights with clear skies.
The denser atmosphere of Venus also adds to the greenhouse
effect there. The added density is like throwing on more blankets
to keep you warm in bed. The more blankets you have, the less heat