Why are the atmospheres of Venus and Earth so different?

Answer 1

Venus and Earth are thought to have started out much the same way and have similar masses and composition, however, Venus is slightly closer to the sun.

This made it warmer and meant that water evaporated much easier and other gases would have more kintetic energy. While Earth and Venus have roughly the same amounts of carbon dioxide, the warmer temperatures on Venus meant that when it's surface was molten many millions of years ago, the carbon dioxide more readily escaped from the molten rock and ended up in the atmosphere, creating a layer of smog which trapped in energy from the sun, causing the temperature to rise more, and more carbon dioxide and water vapor to be released. The water vapor eventually reacted with sulpher dioxide and the result was basically a horrible, hot, smoggy place to live.

Carbon dioxide is heavy and the atmospheric pressure on Venus melts and crushes metal.

Answer 2

The atmosphere of the planet consists of 97 percent carbon dioxide (CO2) and is so thick that the surface pressure is 96 bars (compared with 1 bar on Earth). The surface temperature on Venus varies little from place to place and is extremely hot, about 462°C (736 K/864°F). The high surface temperature is explained by an intense greenhouse effect. Even though only a small percentage of the solar energy that falls on Venus reaches the surface, the planet stays hot because the thick atmosphere prevents the energy from escaping.
That nearly all of Venus's atmosphere is CO2 is not as strange as it might seem; in fact, the crust of Earth contains almost as much CO2 chemically bound in the form of limestone. About 3 percent of the Venusian atmosphere is nitrogen gas (N2). By contrast, 78 percent of Earth's atmosphere is nitrogen. Water and water vapor are extremely rare on Venus. Many scientists argue that Venus, being closer to the Sun, was subjected to a so-called runaway greenhouse effect, which caused any oceans to evaporate into the atmosphere. The hydrogen atoms of the water molecules could have been lost to space and the oxygen atoms to the crust. Another possibility is that Venus had very little water to begin with.

Cloud particles on Venus mostly consist of concentrated sulfuric acid. Earth’s atmosphere also contains a very thin haze of sulfuric acid particles in the stratosphere. On Earth, however, sulfuric acid does not build up because rain carries it down to react with surface materials. On Venus the acid evaporates at the cloud base, which lies about 50 km (31 mi) above the surface, and so remains in the atmosphere. The upper parts of the clouds, visible from Earth and from Pioneer Venus 1, extend as haze 70 to 80 km (44 to 50 mi) above the surface. The clouds contain a pale yellow impurity, better detected at near-ultraviolet wavelengths. Variations in the sulfur dioxide content of the atmosphere may indicate active volcanism on the planet.

Certain cloud patterns and weather features that can be discerned in the cloud tops give some information about wind motion in the atmosphere. The upper-level winds circle the planet at 360 km/h (225 mph).

its entirly different from our planet, and also its atmosphere is very thin compared to earth.so, atmosphere also has ,any drastic differences

Answer 3

Because Venus is closer to the sun and therefore receives much more radiation than we do here on Earth. The atmosphere around Venus is caught in a "runaway greenhouse effect". Some day we here on Earth could also be caught in a runaway greenhouse effect if we do not do something about global warming.

Answer 4

Venus and the Earth began off with easily an identical bulk composition, yet with one significant distinction. Venus shaped closer to the solar than Earth did, and whilst the solar powered as much because it particularly is modern-day brightness, Earth chanced on itself in the zone around it the place liquid water became good, Venus became no longer. Water began to be pushed into the top environment, the place image voltaic UV radiation dissociated it into hydrogen and oxygen. The hydrogen immediately escaped and the oxygen mixed with the exterior rocks. The steamy environment additionally kick began a runaway greenhouse result, and volcanism persisted to pump CO2 and SO2 into the ambience. This vicious circle persisted till Venus's primordial oceans boiled away. on the early Earth, an identical volume of CO2 exists in spite of the indisputable fact that it dissolved into the oceans the place it shaped carbonate rocks like limestones. On Venus, those carbonate rocks broke down and released their CO2 to the ambience. in the international, the CO2 became additionally being utilized by utilising early lifeforms to means photosynthesis, removing yet greater CO2 from the ambience. On Venus, the CO2 had no place to circulate different than the ambience, and because it particularly is concentration grew the greenhouse result have been given even superior. After the oceans boiled away, all yet adequate of Venus' water to cover it to a intensity of below an inch baked out of the crust and top mantle. That small volume of final H2O will strengthen Venus' Hellish floor temperature better than 2 hundred levels above what the thick CO2 environment on my own might. So the quick version is CO2 dissolved into the oceans of Earth and shaped carbonate rocks and fed youth in the international. On Venus, the CO2 became on no account sequestered from the ambience to the quantity it particularly is been in the international. whilst the planet fell sufferer to a runaway greenhouse result, all of it's CO2 became released into the ambience the place it remained to right now time.

Answer 5

Because of the dramatic distances they are from the sun. Earths atmosphere is directly a result from having liquid water.

Answer 6

according to me,the atmospheres on Venus and Earth are different bacause of their different positions in the universe.
it's bacause of the difference in the distance of each from the sun.

Answer 7

Because they are 2 different planets. Also because of their distance from the sun.

Answer 8

because they are different planets each planet has its own temperature and pressure and each planet has its own distance far from the sun then then their atmosphere must be different

Answer 9

How did you feel while on Venus?

Answer 10

venus is closer to the sun and has more exposure to the suns rays