Which planets have atmospheres

Their cloud composition depends on their temperature, and studies suggest that the clouds are unevenly distributed. Orbiting so close to its host star, the planet could not maintain liquid water and likely would not be able to support life. Here are 10 tidbits: 1. An infrared composite image of the two hemispheres of Uranus.

Keck Observatory. Also, if you are closer to the Sun, the atmosphere is hotter and the molecules are moving faster and so can reach escape velocity.

This is why Mercury has no atmosphere, but much smaller and colder Pluto can still retain a thin atmosphere. There are other factors, too. Some moons have a thin atmosphere because they have some internal heat and thus volcanoes and geysers that can replenish their very thin atmospheres. Then there is Venus, where it got so hot what is called a runaway greenhouse that some of the rocks have boiled away. Earth and Venus have about the same amount of carbon dioxide, but on the Earth most of it is dissolved in water no water on Venus and in carbonate rocks.

On Venus, all of the carbon dioxide is in the atmosphere. Page maintained by. Mercury has a very thin atmosphere containing Hydrogen, Helium, Oxygen and traces of other substances.

It's atmosphere is actually mostly particles from the sun solar wind and surface decay and is constantly being swept away due to the solar wind. It has a surface pressure of about 0. It has a surface pressure of It has no surface being a gas giant.

Saturn has an atmosphere containing Hydrogen and Helium. It also contains Sulphur which makes it yellow. Uranus has an atmosphere containing Hydrogen and Helium.

Each of the planets has a different atmosphere, although there are clear similarities between the atmospheres of the four terrestrial planets and the four gas giant planets. The terrestrial planets are rich in heavier gases and gaseous compounds, such as carbon dioxide, nitrogen, oxygen, ozone, and argon. In contrast, the gas giant atmospheres are composed mostly of hydrogen and helium. The atmospheres of at least the inner planets has evolved since they formed.

This is clearest for the Earth. Here is basic information on the atmosphere of each planet to guide your Post Lab discussion. Mercury has a very thin, almost undetectable atmosphere composed of sodium and potassium gas. These elements were likely blown from the surface of Mercury by the solar wind.

The atmosphere of Venus is composed mainly of carbon dioxide with minor amounts of nitrogen and trace amounts of nitrogen, helium, neon, and argon. The Earth 's atmosphere primarily composed of nitrogen and oxygen.