Exploration of Jupiter disadvantages for colonization because of the severe radiation conditions prevailing in Jupiter's magnetosphere and the planet's particularly deep gravitational well. Jupiter would deliver about 36 Sv (3600 rem) per day to unshielded colonists at Io and about 5.4 Sv (540 rems) per day to unshielded colonists at Europa, which is a decisive aspect due to the fact that already an exposure to about 0.75 Sv over a period of a few days is enough to cause radiation poisoning, and about 5 Sv over a few days is fatal. Ganymede is the Solar System's largest moon and the Solar System's only
Wonders of the Solar System of the Namib Desert is compared to what is known of the surface and depleted atmosphere of Mars, and is used to give an explanation of how the Earth maintains its temperature. Cox then explains how the damaging effect of the sun's solar wind is deflected by the Earth's magnetosphere. Next, he discusses the transformative effect of weather on a planet's surface, such as the global dust-storms on Mars or the electrical-storms of Jupiter. The episode continues with an in-depth comparison of Saturn's largest moon, Titan, using data gained from the Huygens probe's January 2005 descent down to the frigid