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
Exploration of the Moon a sample return mission with its Chang'e 5 spacecraft in 2017, but that mission has been postponed until December 2019 due failure of the Long March 5 launch vehicle. India expects to launch another lunar mission in January 2019, the Chandrayaan-2, which would place a robotic rover on the Moon. Russia also announced to resume its previously frozen project Luna-Glob, an unmanned lander and orbiter, which is slated to launch in 2016. In 2015, Roscosmos stated that Russia plans to place an astronaut on the Moon by 2030 leaving Mars to NASA. The purpose is to work jointly with NASA