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
Caverns of Mars The system is similar to the one used in "Moon Patrol". The game also added a pause feature. In 1983, Atari released "Caverns of Mars" on a cartridge (RX8021). In 2005, a version of "Caverns of Mars" was included on the Atari Flashback 2 classic game console. Datamost's "Cavern Creatures" (1983) for the Apple II and homebrew game "Conquest of Mars" (2006) for the Atari 2600 are both direct clones. "Computer Gaming World" called "Caverns of Mars" "delightful ... addictive and excellently paced". It noted the age of the author and stated that the game "has all the look, feel,