Venus is the second planet from the Sun, orbiting it every 224.7 Earth days. The planet is named after the Roman goddess of love and beauty. Venus is classified as a terrestrial planet and is sometimes called Earth's "sister planet" owing to their similar size, gravity, and bulk composition (Venus is both the closest planet to Earth and the planet closest in size to Earth). Venus is currently being terraformed in an expanded effort derived from the Martian model.
Venus initially experienced a retrograde spin and a day longer than its year, with no moon of any kind to balance its axis or provide an internally generated magnetic field. Unlike Mars, no group of asteroids would be enough to generate a massive enough moon to provide an adequate magnetosphere, resulting in mankind's largest planet-lifting project to date, with the de-orbiting of Rhea from Saturn to become the new Venusian moon, a process that took decades to achieve.
During the repositioning of Rhea, construction began on a series of large mass drivers on the surface of Venus that would eject some of the CO2 rich atmosphere into space over time, reversing its orbit and achieving a 24 hour day in 30 years time. Around the same time where the planet had achieved a reasonable day and a new moon, the atmosphere that remained was injected with Hydrogen and Nitrogen extracted from Saturn and Titan respectively. The Hydrogen (H2) bonded with the CO2 atmosphere creating water that resulted in a torrential downpour that continues to this day with regular injections of Hydrogen shipped in massive tankers from the outer planets. Nitrogen from Titan provides a buffer gas to the increasing oxygen in the atmosphere created from the initial bacteria and algae suite.
Today Venus is largely uninhabited, its small population relegated to domed and underground cities, where the population will largely remain until terraforming is completed sometime in the middle of the 22nd Century.