The cover the entire planet. Temperatures on the surface of Venus approach 475 °C, and the atmospheric pressure is 93 times what you experience here on Earth

Clouds consist of sulfur dioxide and drops of sulfuric acid.

Over the poles, these consist of CO₂, over the equator they are made of water ice.

The great red spot is a storm that has been raging for at least 350 years.

At one level there are clouds of ammonia, at another level there are clouds made of ammonia and sulfur, and at a third level there are clouds of water

Each side of the hexagon is over 8000 miles long

    Molecular hydrogen: 80 percent
    Helium: 19 percent
    Methane 1.5 percent
    Hydrogen Deuteride: 192 parts per million
    Ethane: 1.5 parts per million

methane clouds to condense in the highest layers of the atmosphere. Scientists think that clouds made up of ammonia and hydrogen sulfide exist at higher pressures. Farther down, clouds of hydrogen sulfide, ammonium sulfide, ammonia, and water could exist. Clouds of water-ice may be found at pressures of 50 bars, with clouds of hydrogen sulfide and ammonia beneath them. winds of 1,305 miles per hour (2,100 km per hour),

Neptune's atmosphere is composed predominantly of hydrogen and helium, with traces of methane to create the bluish color. Unlike the terrestrial planets, Neptune and the other gas giants still hold much of the atmosphere they had at their formation. Temperature and pressure shift at different heights. The average temperature at the top of the cloud tops is -346 degrees Fahrenheit (minus 210 degrees Celsius).