Mass Effect 1 – Galaxy Map

Local Cluster

SOL

Mercury

A handful of solar power stations exist on “peaks of eternal light” at the north and south poles of Mercury. The difficulties imposed by the planet’s proximity to the sun and high orbital velocity have limited development.

Population: 340

Orbital Distance: 0.39 AU
Orbital Period: 88 Earth Days 
Radius: 2440 km
Day Length: 58.7 Earth Days 
Atmospheric Pressure: Trace 
Surface Temperature: 430 Celsius
Surface Gravity: 0.38 G

Earth

For detailed information, please refer to the standard issue Alliance Galactic Codex. Earth orbit is riddled with debris generated by “bootstrap” space development; use of kinetic barriers is recommended at altitudes over 85 km.

Population (Surface): 11.4 billion 
Population (LY and LS stations): 250,000

Orbital Distance: 1 AU
Orbital Period: 1 Earth Years
Radius: 6378 km
Day Length: 23.9 Earth Hours
Atmospheric Pressure: 1 Earth Atmospheres 
Surface Temperature: 23 Celcius

Luna

An early source of helium-3, Luna is now mined for materials used in space habitat construction. Two dozen major stations have been constructed at Earth’s L4 and LS Lagrange points, all from lunar resources.

Colony Founded: 2069
Population: 4.1 million 
Capital: Armstrong

Orbital Distance: 384,403 km (from Earth) 
Orbital Period: 27.3 Earth Days
Radius: 1737 km
Day Length: 27.3 Earth Days 
Atmospheric Pressure: Trace 
Surface Temperature: -53 Celsius

Venus

With its molten temperatures, sulphuric acid clouds, and crushing carbon dioxide atmosphere, Venus has only a handful of aerostat research outposts.

Population: 800

Orbital Distance: 0.72 AU
Orbital Period: 224.7 Earth Days
Radius: 6052 km
Day Length: 243 Earth Days
Atmospheric Pressure: 90 Earth Atmospheres 
Surface Temperature: 465 Celsius
Surface Gravity: 0.88 G

With its molten temperatures, sulphuric acid clouds, and crushing carbon dioxide atmosphere, Venus has only a handful of aerostat research outposts.

Population: 800

Orbital Distance: 0.72 AU
Orbital Period: 224.7 Earth Days
Radius: 6052 km
Day Length: 243 Earth Days
Atmospheric Pressure: 90 Earth Atmospheres 
Surface Temperature: 465 Celsius
Surface Gravity: 0.88 G



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