Welcome. This City Journal is dedicated to the recreation of the entire Mass Effect Galaxy; that being it's known worlds. This is complimentary to the 'proper' Mass Effect: Beyond City Journal, as a reference and information page to the galaxy's worlds (in any case, the ME:GC lacks the story oriented writings and presentations that ME:Beyond normally provides). This will be done systematically: first, system by system, star cluster by star cluster, then mentioned systems with unknown galaxy locations will be listed. Each planet revealed will be accompanied with a single image and information input, on top of the planetary overview display. This will give you the chance to glimpse all the galaxy's planets. This CJ will likely end once all planets and notable stellar objects and systems are covered.
First off, let's start with the star cluster; Rosetta Nebula in the Terminus Systems, at a known star system by the formal designation Alpha Draconis.
Stars : 1
Planets : 2
Notable Natural Satellites : 0
Notable Dwarf Planets or Asteroids : 0
Notable Artificial/Orbital Stations : 0
Detected as an Earth-like world via telemetry by human scientists based in the Enoch system in 2165 CE, 2175 Aeia became of special interest to the Human Systems Alliance upon its finding. The deployment of flyby probes sent specifically to monitor and verify the scientific hypothesis of Aeia, it became upgraded to a garden world colonization priority when initial scans and images of the planet verified its garden world state. However, when an Alliance survey ship, the SSV [Hugo] Gernsback, was dispatched to the system in 2173, the ship inexplicably stopped reporting back, effectively blacking out upon reaching the system. Later unofficial surveys of the planet made by the 'then-Cerberus' human vessel, the Normandy SR-2 and its crew detected and confirmed the planet's nitrogen-oxygen atmospheric makeup. The planet's atmosphere suggested carbon-based fauna and photosynthetic flora. however the Normandy's extraction of Gernsback survivors, found evidence of neural-degeneration when native flora was consumed by non-native sapients. Later years and further scans of the planet have made it a rather undesirable world, currently moderately ranking on the Alliance's colonization priority.
(The above depiction is of 2175 AR2's largest moon; Unnamed)
A large gas giant world, and second from the star Alpha Draconis; the formally unnamed world, known only as its catalog name 2175 AR2, is a standard hydrogen-helium Jovian. Initial surveys of the planet detected the world and 21 natural satellites. One moon of particular interest, yet to be named, is of a near-earth size, and contains a relatively thick nitrogen-methane atmosphere. The few observations made by short probe flybys of the unremarkable system yielded evidence of hydrocarbon seas and lakes; similar to that of Saturn's moon, Titan. It's other moons are largely airless, with only one other moon that appears to have a substantial atmosphere.