2006-11-12 08:49:43 · 6 answers · asked by althepal78 2 in Science & Mathematics ➔ Astronomy & Space
greenhouse gases gone a-muck....
the cloud cover creates pressure on the surface....for all the sulfur and co2 in the air, it adds to the already high temperatures near the ground.
basically, in lamens terms...being on the surface of Venus is almost an awful lot like being in one of those pressure cookers KFC uses to make their fried chicken....
2006-11-12 08:53:03 · answer #1 · answered by Charlie Bravo 6 · 1⤊ 1⤋
Two effects.
The first is that Venus is about 3/4 of Earth's distance to the Sun (http://en.wikipedia.org/wiki/Venus ). This means that the solar heat is nearly doubled. By itself, it's a small effect; if the Earth was where Venus is, the surface temperature would only increase about 74 kelvins, which is nothing to sneeze at, since that would pretty kill all humans.
The only way for a planet to lose heat is through black-body radiation (http://en.wikipedia.org/wiki/Planck#Black-body_radiation ). Since CO2 is a strong absorber, it has low emissivity. If you plug in a 0.1 emissivity into the energy balance equation for the planet, you'd get something like a 700-kelvin blackbody temperature, which is roughly consistent with the surface temperature of Venus.
2006-11-12 17:26:36 · answer #2 · answered by arbiter007 6 · 0⤊ 0⤋
Run-away greenhouse effect. Venus's atmosphere is much denser than ours, and it's almost entirely carbon dioxide (about 95%). Carbon dioxide is a good greenhouse gas - it traps the heat in, so the surface gets hotter and hotter.
We have the greenhouse effect here on Earth, too. Here it's carbon dioxide and water vapor that are the main greenhouse gases - you've probably noticed that cloudy nights are generally warmer than clear nights. That's because the clouds help keep the heat in, but when it's clear the heat can more easily escape out into space.
2006-11-12 17:46:56 · answer #3 · answered by kris 6 · 0⤊ 0⤋
Venus was like Earth in past.but the distance between sun and Venus is 27.7% than between Earth and Sun and that fact was the cause of Greenhouse effect.Oceans dried up.atmosphere was filled with Co2.the temperature reached 480 degree Celsius what it is right now.
2006-11-12 17:08:47 · answer #4 · answered by Anonymous · 0⤊ 0⤋
Global warming! Venus's atmosphere is thick, I think 90x the density of earth's and it is made of mostly CO2 which is a greenhouse gas. Heat goes in, and then gets trapped. That's why Venus is so darn hot.
2006-11-12 16:53:05 · answer #5 · answered by Roman Soldier 5 · 1⤊ 0⤋
Sol.
2006-11-12 16:51:32 · answer #6 · answered by Gaspode 7 · 0⤊ 0⤋