Human mission to Mars propellant from the Martian Atmosphere. This proposal drew on concepts developed by the former "Case for Mars" conference series. Over the next decade, Zubrin developed it into a mission concept, Mars Direct, which he presented in a book, "The Case for Mars" (1996). The mission is advocated by the Mars Society, which Zubrin founded in 1998, as practical and affordable. In 1991 in Toulouse, France, the International Space University studied an international human Mars mission. They proposed a crew of 8 traveling to Mars in a nuclear-powered vessel with artificial gravity provided by rotation. On the surface, 40 tonne habitats
Dora the Explorer: Journey to the Purple Planet show, the game is about Dora who has a task to complete or a place to reach with her monkey, Boots. Dora has three, or, in some double-length episodes, four, places to go, with the final place as the destination. The game is about Dora and Boots who find some lost aliens from the Purple Planet. However, to take them home, she and Boots are required to collect keys from different planets to open the Space Door, leading to the Purple Planet. To fuel the rocket ship loaned to them, Dora and Boots need to collect 10 space gems in