Extraterrestrial Locations

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This article is about Subnautica Lore. You may be looking for the Sector Zero Map.

Extraterrestrial Locations are locations in the universe that are not of Earth, such as other planets, moons or space stations. This page serves as a list of known stations and orbital bodies in the Subnautica universe.

Multi-Planet Systems

4546

4546 is a star system located in the Ariadne Arm with at least 11 orbital bodies larger than Earth's moon. The system is outside of federation space and is therefore not owned by any Trans-Govs but is also not unexplored. One of these bodies is Planet 4546B, which is slightly smaller than Earth and is an ocean planet with a breathable atmosphere and great biodiversity. The planet is also host to a sapient form of life, the Sea Emperor Leviathan, as well as the non-native Architects.

4546B System

4546B is known to have 2 moons orbiting close to the planet, one of which periodically causes solar eclipses.

Planets

Auwell

Auwell is an independent planetary research colony that supports life. The only mentioned form of native life on Auwell is the Auwellian toadworm and some form of leaf-bearing plant.

Auwell is the planet where Robin Ayou, Sam Ayou, and their mother moved to when Robin was five years old. The colony was eventually shut down due to an accident that resulted in their mother's death.

Boreal 9

Boreal 9 is a planet characterized by its acid swamps. It is mentioned by the PDA in Subnautica as motivational note. Known native life forms include arachnid kidney-poachers, tree-roaches and egg-laying starwals, as well as a host of plant life such as stankroot. Because there are "tame starwhals" on the planet, it can be inferred that Boreal 9 was civilized or at least inhabited by humans. The planet is notorious for being a location of Craig McGill's adventures.

Byzantos-5

Byzantos-5 is a planet where Xenoworx had Robin Ayou survive with limited resources.

Deltar-6

Deltar-6 is the planet that Vinh Pham's girlfriend Iriane mentioned on Vinh's Postcard.

Obraxis Prime

Obraxis Prime is a planet mentioned by the PDA in Subnautica. Little is known about it, except that it is infamous for a massacre which resulted in the removal of weapons from standard fabricators (with the exception of the Survival Knife).

Scott III

Scott III is a Mongolian-controlled planet. Due to the presence of a Xeno Prospecting division, it can be assumed that the planet sustained life. At one point in her career, Robin Ayou worked on this planet, though it's unclear what she worked as.

Strader VI

Strader VI is an Alterra-controlled planet that was found to harbor a sentient, hivemind-forming life form. The discovery of this life form made the planet an important point in the field of biology, considering scientists stayed on the planet to research for at least two decades. Robin Ayou worked on this planet as a xeno-researcher for a large part of her life.

Terra 17

Terra 17 is a largely civilized Alterra-controlled planet. Little is known about the planet save that Alterra has set up controlled habitats on it for its citizens, implying the planet may not be naturally habitable.

Space Stations

City-Station 749

City-Station 749 is an Alterra-controlled space station. The name implies it is about the size of a modern-day city. The station is known to possess Alterra-oriented schools. It is the location in which Sam Ayou and Robin Ayou were born.

Sanjei Station

Sanjei Station is an Mongolian-controlled space station. Due to the way Second Officer Keen refers to it, it can be assumed that the Aurora crew took advantage of the hospitality of the Sanjei inhabitants, acquiring free refueling and food in return for searching for the Degasi, a task they never intended to complete.

Vesper Station

Vesper Station was an orbital station that was used by Alterra to monitor Planet 4546B and possibly other astronomical bodies like 4546B's moons. It was also responsible for salvaging the wreckage of the Aurora. The Vesper was later cut with the introduction of the new story after the Frostbite update.

Unknown/Unnamed Planets

Prawn Suit poster planet (land)

This Prawn Suit poster depicts a planet that has rocky small islands and a some kind of ocean. It is almost certainly not on 4546B, but other than that there's no evidence of what planet it could be.

Prawn Suit poster planet (sea)

This Prawn Suit poster depicts the suit underwater in some ocean. Judging by the organisms in the background, it's not on 4546B. It may be the same planet the land variation of the poster is set in, but there's no in-game evidence of this.

Mercury II background planet

The poster for the Mercury II shows a planet in the background. Nothing is known about this planet other than it was visited by the Mercury II at some point. It could possibly be territory of the Sol-Trans Gov, but there's no in-game evidence of this.

Architect Relics Origin Planets

Many relics can be found in the Primary Containment Facility and Quarantine Enforcement Platform, one of which being of human origin with a few others pointing to contact with humans on Earth around the 13th century. It is not known if the other relics were from other planets or created by the Architects.

Potato's Planet

A picture frame of Robin Ayou's pet cat Potato shows a planet similar to Earth containing similar flora.

Trivia

• "Obraxis Prime" and "Strader VI" are references to Subnautica developers Scott "Obraxis" Macdonald and Cory Strader. "Scott III" may also be a reference to Scott Macdonald or another Subnautica developer, Scott Thunelius.