Sol

Sol is the home system to the humans and the Systems Alliance. Note that Pluto appears on the system chart and is considered a planet for game purposes, as Pluto had not yet been reclassified as a "dwarf planet" when Mass Effect was released. Charon is not on the star map, but is included here for background. In the game, it is one of the largest star systems, having 9 planets while most other systems have 4 or 5 planets. The Solar System contains two distinct debris rings: the Asteroid Belt and the Kuiper Belt. However only the Asteroid Belt is shown within the game. This may be due to the fact that Pluto lies within the Kuiper Belt.

The positions of the planets in Mass Effect 2 suggest that the game takes place on 01/26/2185; 175 years after the North American release date of the game, 01/26/2010. In Mass Effect 2, most of the planets in Sol can be mined, with the exception of Earth and Mars. However none of the planets have beyond a Good rating for minerals.