Venus formed 4.6 billion years ago together with the Sun and the solar system. Large amounts of dust and gas accumulated over many years to form the planet. Venus is thought to be the result of a major collision. This is due to the fact that Venus rotates differently than the other planets in our solar system. Venus is commonly referred to as Earth's "sister planet" due to their similarity in size and similar gravitational pull. Although Venus and Earth share some similarities, they have been shown to be very different from Earth in many other aspects. It has the densest atmosphere of the four terrestrial planets. Venus is made up of over 96% carbon dioxide. The surface shows signs of extreme volcanism and the sulfur in the atmosphere could mean there have been some recent eruptions. Venus is covered by a thick atmosphere, which creates a fiery environment with temperatures reaching high enough to melt lead. Much of Venus' surface appears to have been shaped by volcanic activity. Venus is home to approximately 167 large volcanoes. Some extend over 100 km in length. Fri...