Milky Way

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.

Varmalus

 * Phoenix
 * Carbonaceous Asteroid*
 * Patashi
 * Sylsalto
 * Tuntau
 * Vebinok

Armstrong Nebula

 * Gagarin
 * Antirumgon
 * Junthor
 * Pressha
 * Rayingri
 * Sogelrus
 * Grissom - Unlocked as part of UNC: Geth Incursions
 * Benda
 * Notanban
 * Solcrum
 * Rocky Asteroid*
 * Zaherux
 * Hong
 * Casbin
 * Matar
 * Pomal
 * Theshaca
 * Treagir
 * Tereshkova
 * Antibaar
 * Hunsalra
 * Mawinor
 * Patamalrus
 * Solmarlon
 * Thegeuse
 * Carbonaceous Asteroid*
 * Vamshi
 * Almos
 * Maji
 * Pregel

Proteus

 * Survey for Oxygen as part of UNC: Valuable Minerals

Circe

 * Survey for Helium-3 as part of UNC: Valuable Minerals

Pharos

 * Survey for Turian insignia as part of UNC: Turian Insignias

Metallic Asteroid*

 * Survey for Platinum as part of UNC: Valuable Minerals

Therum

 * Can land on

Archanes

 * Survey for Nitrogen as part of UNC: Valuable Minerals

Sharjila

 * Can land on

Porolan

 * Survey for Matriarch's writings as part of UNC: Asari Writings

Metallic Asteroid*

 * Survey for Titanium as part of UNC:Valuable Minerals

Fargeluse

 * Survey for Xenon as part of UNC: Valuable Minerals
 * Sparta - Unlocked as part of UNC: Missing Marines
 * Alsages
 * Altaaya
 * Asteroid Cluster*
 * Edolus
 * Ontamalca
 * Tremanre

Syided

 * Survey for League of One medallion as part of UNC: Locate Signs of Battle

Eletania

 * Land on as part of UNC: Lost Module

Zatorus

 * Survey for Gold as part of UNC: Valuable Minerals
 * Theseus
 * Logan
 * Feros
 * Quana
 * Sytau

Exodus Cluster

 * Utopia

Han

 * Unlocked as part of UNC: Hostile Takeover

Paravin

 * Survey for Matriarch's writings as part of UNC: Asari Writings

Mavigon

 * Land on as part of UNC: Hostile Takeover

Patatanlis

 * Survey for Beryllium as part of UNC: Valuable Minerals

Dis

 * Unlocked as part of UNC: Hostile Takeover

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

Raysha

 * Survey for Turian Insignia as part of UNC: Turian Insignias

Hawking Eta

 * Century

Noveria

 * Land on as part of Noveria: Geth Interest

Veles

 * Survey for Matriarch's writings as part of UNC: Asari Writings

Strenuus

 * Unlocked as part of UNC: Privateers

Fortuna

 * Unlocked as part of UNC: Hostile Takeover

Maganlis

 * Survey for Turian insignia as part of UNC: Turian Insignias

Therumlon

 * Survey for Plutonium as part of UNC: Valuable Minerals

Amaranthine

 * Land on as part of UNC: Hostile Takeover

Kepler Verge

 * Newton
 * Juncro
 * Klencory
 * Ontarom
 * Sesmose
 * Herschel

Local Cluster

 * Sol
 * Mercury
 * Venus
 * Earth
 * Luna
 * Mars
 * Jupiter
 * Saturn
 * Uranus
 * Neptune
 * Pluto
 * Charon - not on the map, included for background.

Serpent Nebula

 * Widow
 * Citadel

Yangtze

 * Unlocked as part of UNC: Cerberus

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

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