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
The Complaint of Mars sky. Yet, because of the size of their planetary orbitals, Venus appeared to move away from the house of Taurus much more quickly than Mars. Thus, Chaucer uses the image of Mars wearing heavy armor as a means of explaining the natural phenomena. Altogether, the “Complaint of Mars” serves as an allegory for the astrological phenomena that occurred in April 1385. While this date is still under some debate, the astrological facts are presented as undertones for Chaucer’s poem. Adaptations of Roman myths were popular amongst many authors of the middle ages, and Chaucer wrote several poems in this vein,