Infernas is a hot, rocky moon added in the 'Planet Cyran' planet pack, and the innermost moon orbiting Cyran. It's a hot inferno, hence it's name. Infernas is unique for being a moon that is breaking apart and even using a particle system to show this.


In-Game Description

"A moon orbiting way too close to Cyran for comfort. This moon is literally being broken apart by Cyran's gravitational pull. The debris has formed a ring around the large gas giant, and in a few hundreds of thousands of years, that ring will be all that's left of this moon. Visit while you can!"


Physical Properties

Infernas' surface is covered in basalt and Sulfur-rich compounds, although one half of the moon has been pulled away by Cyran, exposing the moon's core. The lava on this side of the moon is hot enough to melt anything that gets too close, therefore avoid landing on this side of Infernas.


Infernas has a tiny atmosphere, it was denser in the past but Cyran has pulled most of it away. The remaining atmosphere consists of Carbon Dioxide, Sulfur Dioxide, Argon and Hydrogen, with a surface pressure of 20.3 kPa.

Orbital Properties

  • Orbits: planet Cyran
  • Semi-Major axis: 15434224.5623812 m
  • Inclination: 0
  • Eccentricity: 0
  • Longitude of Ascending Node: 0
  • Argument of Periapsis: 0
  • Mean Anomaly at Epoch: 0
  • Epoch: 0
  • Orbit color: reddish orange


Infernas has four biomes, and these are:

Badlands (blue)

Molten Surface (red)

Crater Edge (green)

Poles (black)

Note: the biomes Molten Surface and Crater Edge have a higher 'value'.


Quote from the author of the Planet Cyran mod:

"Ah, Infernas. I actually came up with the idea when reading an article about Triton, a moon of Neptune. Triton's orbit is decaying, and thus it'll eventually drop below the Roche limit and will be pulled apart by tidal forces. That gave me an idea: a moon that is molten on the side facing it's parent planet. I knew that with Kopernicus' particle system I could actually make the moon look like it's breaking apart. Fun fact: Infernas' heightmap is actually made from a highly edited colormap exported from Space Engine, but the rest is built from code only."


  • According to calculation, for Infernas the Roche limit equals 5769359.55 m. Currently Infernas orbits at roughly twice that distance, but it was placed this far out on purpose: if Infernas would actually orbit at the roche limit, Cyran's pull would be overwhelming that of Infernas, making it impossible to land.
  • According to the author (as stated above) Infernas has been inspired by real-life Triton, which is estimated to suffer the same fate as Infernas, although Tritan has a retrograde orbit and is therefore theorized to be a captured moon, unlike Infernas which has likely formed around Cyran but was pushed inwards by the gravity of the other moons.
  • Infernas is unique for being the only Kopernicus planet or moon to add story to the origin of a nearby ring system and actually using the ring system of it's parent planet, in Infernas' case the particles it emits are dragged into the rings.
  • The 'Planet Cyran' planet pack comes with a flag showing Infernas based off the 'Minimalistic' flag texture by SQUAD.

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