Serpent Nebula

Serpent Nebula
Milky Way / Serpent Nebula
Cluster View
Systems	2
Relays	12+

See also: Codex: Serpent Nebula

The dense Serpent Nebula surrounds the ancient Citadel and is one of the station's most effective defences. The thick gas and dust from the nebula make it impossible for enemy ships to launch an organised attack or locate the Citadel without co-ordinates. Commander Shepard can get a good view of the Serpent Nebula from the Upper Wards.

The composition and origin of the Serpent Nebula is the subject of debate. Some believe the nebula was actually created by the Citadel itself, over millennia of ejecting particles and debris from self-repair into space.

The nebula is home to dozens of mass relays. A number of races' home clusters are directly connected to the Citadel in just one jump: the Annos Basin (salarians), the Apien Crest (turians), the Athena Nebula (asari), the Krogan DMZ (krogan), and the Silean Nebula (elcor).

Mass Relay Connections

Annos Basin± Apien Crest± Athena Nebula± Eagle Nebula‡ Exodus Cluster† Horse Head Nebula†

Ismar Frontier‡ Krogan DMZ‡± Local Cluster‡ Minos Wasteland‡± Silean Nebula±

^{† Mass Effect}

^{‡ Mass Effect 2}

^{± Mass Effect 3}

Locations

Serpent Nebula Boltzmann† Wheeler • Bekenstein • Asteroid belt • Thooft • Veltman • Feynman Widow Citadel • Aria's Fleet‡ • Fuel depot† • Mass relay†‡ † Mass Effect 2 ‡ Mass Effect 3

Missions

Mass Effect

• Mission: Citadel: Expose Saren
• Mission: Citadel: Garrus
• Mission: Citadel: Shadow Broker → Citadel: Wrex
• Mission: Race Against Time: Final Battle

Mass Effect 2

• Mission: Citadel: Captain Bailey
• Mission: Dossier: The Master Thief
• Mission: Garrus: Eye for an Eye
• Mission: Kasumi: Stealing Memory
• Mission: Thane: Sins of the Father

Mass Effect 3

• Mission: Priority: The Citadel I
• Mission: Priority: The Citadel II
• Mission: Priority: The Citadel III
• Mission: Citadel: Alien Medi-Gel Formula
• Mission: Citadel: Asari Widow
• Mission: Citadel: Barla Von
• Mission: Citadel: Batarian Codes
• Mission: Citadel: Biotic Amp Interfaces
• Mission: Citadel: Cerberus Automated Turret Schematics
• Mission: Citadel: Cerberus Ciphers
• Mission: Citadel: Cerberus Retribution
• Mission: Citadel: Cerberus Turian Poison
• Mission: Citadel: Chemical Treatment
• Mission: Citadel: Dr. Bryson
• Mission: Citadel: Leviathan I
• Mission: Citadel: Leviathan II
• Mission: Citadel: Leviathan III
• Mission: Citadel: GX12 Thermal Pipe
• Mission: Citadel: Hanar Diplomat
• Mission: Citadel: Heating Unit Stabilizers
• Mission: Citadel: Improved Power Grid
• Mission: Citadel: Inspirational Stories
• Mission: Citadel: Kakliosaur Fossil
• Mission: Citadel: Krogan Dying Message
• Mission: Citadel: Medi-Gel Sabotage
• Mission: Citadel: Medical Supplies
• Mission: Citadel: Reaper Code Fragments
• Mission: Citadel: Target Jamming Technology
• Mission: Citadel: Volus Ambassador
• Mission: Citadel: Wounded Batarian

Assignments

Mass Effect

• Assignment: Citadel: Asari Consort
• Assignment: Citadel: Doctor Michel → Citadel: Doctor Michel is Safe
• Assignment: Citadel: Family Matter
• Assignment: Citadel: Homecoming
• Assignment: Citadel: I Remember Me
• Assignment: Citadel: Jahleed's Fears → Citadel: Jahleed's Secret → Citadel: Jahleed and Chorban | Citadel: Jahleed Returns Materials | Citadel: Jahleed Arrested
• Assignment: Citadel: Negotiator's Request
• Assignment: Citadel: Old, Unhappy, Far-Off Things
• Assignment: Citadel: Old Friends
• Assignment: Citadel: Our Own Worst Enemy
• Assignment: Citadel: Planting a Bug
• Assignment: Citadel: Presidium Prophet
• Assignment: Citadel: Reporter's Request
• Assignment: Citadel: Rita's Sister → Citadel: Rita's Sister and Chellick → Citadel: Rita's Sister is Safe
• Assignment: Citadel: Scan the Keepers
• Assignment: Citadel: Schells the Gambler → Citadel: Schells' Scanner Given Away | Citadel: Schells has his Data
• Assignment: Citadel: Signal Tracking
• Assignment: Citadel: Snap Inspection
• Assignment: Citadel: The Fan
• Assignment: Citadel: The Fourth Estate
• Assignment: Citadel: Xeltan's Complaint → Citadel: Xeltan Convinced

Mass Effect 2

• Assignment: Citadel: Crime in Progress
• Assignment: Citadel: Found Forged ID
• Assignment: Citadel: False Positives
• Assignment: Citadel: Krogan Sushi

Trivia

• Routes to and from the Serpent Nebula undergo periodic changes across the games.
  • In Mass Effect, the Serpent Nebula is shown to connect directly to the Horse Head Nebula and the Exodus Cluster. Travel from the Local Cluster has to connect with the Exodus Cluster first before reaching the Serpent Nebula.
  • In Mass Effect 2, the Local Cluster gains a direct lane to the Serpent Nebula. The Ismar Frontier has a direct lane to the Serpent Nebula.
  • In Mass Effect 3, travel from the Horse Head Nebula or the Exodus Cluster now has to connect first to the Annos Basin before reaching the Serpent Nebula. Travel from the Ismar Frontier connects to the Minos Wasteland first before reaching the Serpent Nebula.