The Milky Way galaxy is explorable once you get control of the SSV Normandy and you gain access to the Galaxy Map. The Galaxy Map is located in the center of the Normandy's command deck. Their are four levels of the map. The four levels are Galaxy, Cluster, System and Planetary. Through this map you will be able to explore countless Planets, Space stations and Asteroid Fields that have various objectives.
Planets are massive celestial bodies that orbit a star or stellar remnant. They are of many different sizes and compositions. Planets may have natural satellites (moons) and may or may not be inhabited. Some planets in Mass Effect can only be scanned from space and not landed upon. Travel from planet to planet requires use of the Galaxy Map.
The Milky Way
Items marked with a * are generic and can be scanned but not landed on.
Argos Rho
Hydra
Canrum
Metgos
Syba
Theyar
Varmalus
Armstrong Nebula
- Gagarin
- Grissom - Unlocked as part of UNC: Geth Incursions
- Hong
- Tereshkova
- Vamshi
Artemis Tau
- Athens
- Knossos
- Macedon
- Sparta - Unlocked as part of UNC: Missing Marines
Attican Beta
Exodus Cluster
Gemini Sigma
Ming
Han
- Unlocked as part of UNC: Hostile Takeover
Paravin
- Survey for Matriarch's writings as part of UNC: Asari Writings
Huningto
Mavigon
- Land on as part of UNC: Hostile Takeover
Farcrothu
Patatanlis
- Survey for Beryllium as part of UNC: Valuable Minerals
Hades Gamma
Antaeus
Ageko
Edmos
Ploba
Trebin
Vemal
Hunidor
Farinata
Tunshagon
Rocky Asteroid*
MSV Ontario
Juntauma
Nepneu
Dis
- Unlocked as part of UNC: Hostile Takeover
Jartar
Nearrum
- Survey for Titanium as part of UNC Valuable Minerals
Klensal
- Land on as part of UNC: Hostile Takeover
Metallic Asteroid*
- Survey for Lithium as part of UNC Valuable Minerals
Gremar
Raysha
- Survey for Turian Insignia as part of UNC: Turian Insignias
Hawking Eta
Horse Head Nebula
- Pax
- Strenuus - Unlocked as part of UNC: Privateers
Kepler Verge
Local Cluster
Serpent Nebula
Voyager Cluster
Amazon
Yangtze
- Unlocked as part of UNC: Cerberus
Renshato
Binthu
- Can land on
Dregir
- Survey for Beryllium as part of UNC: Valuable Minerals
Alrumter
- Survey for Prothean data disc as part of UNC: Prothean Data Discs
Patajiri
- Survey for Thorium as part of UNC: Valuable Minerals
Columbia
- Unlocked as part of UNC: Hades' Dogs
Clojia
{{Nepheron]]
- Land on as part of UNC: Hades' Dogs
Ontaheter
- Survey for Samarium as part of UNC: Valuable Minerals
Gromar
- Survey for League of One medallion as part of UNC: Locate Signs of Battle