Mega Man V (Game Boy) weak to specific weapon, the player is encouraged to complete some stages before others. These bosses are known in game as "Mercury", "Venus", "Mars", "Jupiter", "Saturn", "Uranus", "Neptune", and "Pluto", named after the first, second, fourth, and fifth through eighth planets in our Solar System. Pluto was, at the time the game was made, considered a planet, unlike from 2006 and onwards. Terra is named for the Latin word for Earth. Defeating some bosses will allow the player to access Mega Man's robot dog Rush, who can transform into useful "Coil" and "Jet" modes for easier stage navigation. "Mega Man
Colonization of the outer Solar System is subject to only 0.01 rem a day. When NASA carried out a study called "HOPE" (Revolutionary Concepts for Human Outer Planet Exploration) regarding the future exploration of the Solar System, the target chosen was Callisto. It might be possible to build a surface base that would produce fuel for further exploration of the Solar System. The Keck Observatory announced in 2006 that the binary Jupiter trojan 617 Patroclus, and possibly many other Jupiter trojans, are likely composed of water ice, with a layer of dust. This suggests that mining water and other volatiles in this region and transporting them