Euler Solar-system

System Specs:

  • Stellar Mass:  _ Sol Masses
  • Stellar Class:  _
  • Luminosity:  _ Sol
  • Planets:  4
  • Moons:  0
  • Asteroid Belts:  0
  • Asteroids:  0
  • Objects:  0

The star and at least some of the planets in the system appear to be named after human physicists and mathematicians. In particular, the star is possibly named after Leonhard Euler, a Swiss physicist.

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Planets Directory:

  1. Fermi
  2. Benning
  3. Yukawa
  4. Silva

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Fermi:

  • Orbital Distance:  0.6 AU
  • Orbital Period:  0.4 Earth-years
  • Keplerian Ratio:  1.35
  • Radius:  4,194 km
  • Day Length:  60.0 Earth-hours
  • Atmospheric Pressure:  8.09 atm
  • Surface Temp:  358 °C
  • Surface Gravity:  0.63 g
  • Mass:  0.27 Earth-masses
  • Satellites:  >1

Fermi is a rock wrapped in a haze of carbon dioxide and oxygen, though its temperatures and concentrations make it difficult to support life. Many moons and debris are in its immediate vicinity, leading researchers to believe that at some point Fermi was impacted by something large, launching fragments of the planet into orbit.

The wreckage from a scientific station can be detected here–more evidence of the Reapers‘ presence in the system.

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Benning:

  • Orbital Distance:  1.1 AU
  • Orbital Period:  0.9 Earth-years
  • Keplerian Ratio:  1.643
  • Radius:  9,362 km
  • Day Length:  _ Earth-hours
  • Atmospheric Pressure:  1.13 atm
  • Surface Temp:  63 °C
  • Surface Gravity:  1.14 g
  • Mass:  2.438 Earth-masses
  • Colony:  Human (capital:  Joughin, founded:  2153, population:  2,250,000)

Benning, the nearest garden world to Arcturus Station, is the primary source of its food supply and an important staging area for starship maintenance and repair. Occupying the planet would be key in any attempt to retake the system’s relay.

Scattered intelligence indicates that during the battles of Arcturus and Earth, the Reapers sent a small force to Benning to destroy its comm buoys, spaceports, and starships. With the population immobilized and communications cut, the main force concentrated on the larger prize, knowing they could return before repairs could be made or help could arrive.

Heat sources in Benning’s space indicate a non-Reaper presence here.

Codex Entry

Benning was once a thriving human colony, but the Reapers have rounded up a large portion of the populace for processing. Some pockets of civilian resistance still elude the Reapers, however, and rescue attempts are underway. A “resistance radio” established during the early days of the attack continues to broadcast, exhorting survivors to band together and discussing rumors of safe havens. Unfortunately, those rumors have begun to result in ambushes, increasing the desperation of those who remain free.

Through all this, Benning’s automated agricultural systems have continued to operate, leading to unprecedented stores of food in the planet’s granaries and warehouses.

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Yukawa:

  • Orbital Distance:  2.2 AU
  • Orbital Period:  2.7 Earth-years
  • Keplerian Ratio:  1.461
  • Radius:  2,943 km
  • Day Length:  64.9 Earth-hours
  • Atmospheric Pressure:  (trace) atm
  • Surface Temp:  -27 °C
  • Surface Gravity:  _ g
  • Mass:  _ Earth-masses

Yukawa is a small rock planet with a thin atmosphere of carbon dioxide. After a labor dispute with companies shipping metallic asteroids to the nearby Arcturus system, Yukawa’s iron core and blanket of hematite were briefly mined to aid in the construction of Arcturus Station. Yukawa’s reputation as “the scab planet” persists to this day, as its other resources are not particularly notable.

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Silva:

  • Orbital Distance:  4.1 AU
  • Orbital Period:  6.8 Earth-years
  • Keplerian Ratio:  1.491
  • Radius:  31,096 km
  • Day Length:  17.7 Earth-hours
  • Atmospheric Pressure:  _ atm
  • Surface Temp:  _ °C
  • Surface Gravity:  _ g
  • Mass:  _ Earth-masses
  • Satellites:  1

Named for Mateus Silva, leader of the prospector team that unearthed the Prothean Archives on Mars, this ice giant was once home to a large recovery operation for helium-3. In its heyday, the helium-3 flowed freely here to fuel merchant ships commuting from Benning to Arcturus.

All infrastructure on Silva has been destroyed, along with the colony on Oliveira, its moon.

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