Ceres (designated 1 Ceres) is the largest known asteroid (nine hundred fifty-five kilometers in diameter), the only dwarf planet in the inner solar system, and the first asteroid discovered by humanity. It lies in the asteroid belt.

Ceres Station Edit

Cereslevels s

The levels and how they are arranged in comparison to the diameter of Ceres

Ceres is the site of Ceres station, a space station that was one of the first sites of human colonization. Half a generation after humanity arrived there, Tycho Manufacturing managed to spin up the asteroid, which gave it a gravity of 0.3 g. The station has tens of thousands of kilometers of tunnels.

As the most important port in the Belt, the station has a population of approximately six million permanent residents with an extra one million transiting through at any given time. Eight hundred to a thousand ships are docked on Ceres every day.

Ceres was governed by Earth, and station security was handled by the private security firm Star Helix Security.

After the Eros incident, governorship of the station was given to OPA.

Ceres Station levels Edit

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Rapid-Transit Network map of Ceres

The gravity on Ceres is not provided by its own mass but is spin gravity. The level of gravity changes with each level and there is a noticeable Coriolis Effect.

Transportation is provided by an extensive tube train network.

Battle for Ceres Station Edit

Certainly a misnomer, the "battle" was a well planned evacuation by the Marco Inaros-led Free Navy. Expecting a large defensive standoff and assault, the UN Navy, Martian fleet, and OPA loyalist burned into Ceres hard, only to find the station abandoned and there for the taking. The route from Ceres had caught the "Combined Fleet" so off guard their automatic instinct was that it was a trap. With zero armed resistance, and a home security taskforce eager to surrender, the battle for Ceres Station never actually happened. Jim Holden, and the crew of the Rocinante were present and equally taken aback by Inaros's choice to abandon the station.

Media Edit

  • The Medina level on Ceres. With its claustrophobic, neon-drenched atmosphere, the design nods to classic sci-fi movies like Blade Runner.
  • The asteroid colony’s upmarket district, mid-town Ceres is light and airy, even featuring an artificial digital sky.
  • The docks on Ceres. The extending arms grasp ships and hold them until their rotation matches that of the asteroid colony.

Trivia Edit

  • Ceres is the Roman goddess of Agriculture, who in turn is adopted is based on Greek goddess Demeter. In fact, the word cereal is derived from Ceres.
  • As per the NASA science video above, it is estimated that Ceres has a composition of up to thirty percent water or even more.
  • In the world of The Expanse, Ceres is a port city, outfitted with thrusters, put into a spin, creating a centrifugal gravity.
  • Researchers are uncertain how the planets have acquired their angular momentum, and how to change it over time is a difficult problem, due to its massive size
  • According to NASA video above, Mars has strip-mined Ceres bare of its ice, to terraform the red planet.
  • Other material from the asteroid belt that could be mined are titanium, platinum and other precious metals.
  • People live Inside the planet, upside down, so their feet pointed to the surface from within.


  1. Presumed current after Ceres Offensive with was primarily a United Nations mission.

External Links Edit

Concept art
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