Colonization of the outer Solar System the Solar System's gas giant planets for exploration and possibly mining of helium-3, which could have a very high value per unit mass as a thermonuclear fuel. The Jovian system in general has particular disadvantages for colonization, including its severe radiation environment and its particularly deep gravity well. Its radiation would deliver about 3,600 rems per day to unshielded colonists on Io and about 540 rems per day to unshielded colonists on Europa. Exposure to about 75 rems over a few days is enough to cause radiation poisoning, and about 500 rems over a few days is fatal. Jupiter itself,
The Magic School Bus Lost in the Solar System The Magic School Bus Lost in the Solar System The Magic School Bus Lost in the Solar System is the fourth book in Joanna Cole and Bruce Degen's "The Magic School Bus" series. The book depicts arguably the most well-known adventure of the series and introduces the character of Janet. Ms. Frizzle's class is learning about the solar system and Arnold's unpleasant cousin Janet, who constantly raves about herself, has joined them. The Friz decides to take the kids on a field trip to the planetarium, but, once they get there, they find the planetarium is closed. However, on the