And Venus must be hot if the history of the solar system is not the history of no change for billions of years. And Venus was found hot, not room temperature as was thought until 1959. In 1961 it was detected with radio means that it is like something like 600 Farenheit and Mariner 2 was sent out to find out true or not true? It was found that even more it is full 800 [degrees Farenheit].