Planet Venus

Venus, Earth’s twin sister? Characteristics comparison:
The two planets are very similar, but a detailed comparison shows the differences.

Venus, backwards rotation and orbital period:
The rotational period of Venus on its own axis is very slow. With a retrograde rotation, the planet orbits the Sun in 224.7 days.

Venus atmosphere, discovery history:
From reporting a halo and dark spots to CO2 and other constituents discovered with instrumental techniques.

Venus, water evaporation and greenhouse effect:
The planet Venus used to have lots of water, that has been completely evaporated. CO2 remains in the atmosphere of Venus.

Venus clouds, composition and observation:
Venus clouds (containing sulphuric acid) have been observed in the Ultraviolet UV and Infrared IR.

Venus, super rotation of the cloud layer:
The Venusian cloud layer makes one complete tour of the planet in 4.2 days, with wind speeds of 540km/h.

Acid rain on Venus evaporates:
Sulphuric acid rain showers on Venus never reach the surface of the planet due to evaporation.

Volcanoes on Venus, distribution and size:
Venus missions show us thousands of volcanoes, well preserved by the atmosphere of Venus.