Trappist System

The Trappist solar system was an inhabited solar system in the territory of the Allied Systems Federation in the 24th century. The Trappist consists of a red dwarf star and 8 planets. In the system, there were 3 inhabited planets in the system: Avena, Tynan, and Borealis. Of these three, Tynan was the most inhabited. The Trappist system is very small, and the planets orbit rapidly and have orbits close to each other, making planets prominently visible from the other planets.

## Overview

The Trappist System has a small sphere of influence, and its 8 planets orbit very close to their parent star Trappist. Most of these planets are tidally-locked, meaning that one side always faces the star. Due to their close orbits, the various planets have very short years of only a few weeks.

#### **Trappist**

Trappist is a red dwarf star, giving only little light and mostly radiation energy. The star is located roughly 40 light-years from Sol. Its relative proximity and its alluring planetary system made it an early candidate for Humanity's extrasolar exodus in the 22nd century. Its low luminosity makes it difficult to observe from Sol, and its low mass gives it a very small area of gravity lock, which required navigational care when travelling to Trappist.

#### **Naraka & Jahannam**

Naraka is the first planet from the star. It is a Venus-like terrestial planet. Due to its crushing atmosphere and extreme temperatures, the planet was consider uninhabitable and generally useless.

Jahannam is the second planet from the star. It is a Venus-like terrestial planet. Due to its thick atmosphere and very high temperatures, the planet was consider uninhabitable and generally useless.

Both Naraka and Jahannam are tidally-locked to Trappist. Due to their close orbits to the star, and thick atmospheres, the weather on both planets is beyond extreme for human measures. Immense temperature differences between the day- and nightsides cause extreme winds and lightning storms, causing continual lightshows that are visible on all inhabited planets of the star system. Aside from that, the radiation from the star combined with the electromagnetic disturbances from the lightning storms make these planets dangerous to approach without heavy shielding on a spaceship.

## Physical characteristics

### Mean temperature

26 degrees celsius, at the terminator line.

### Atmospheric composition

nitrogen-oxygen, pressure of 0.6 atm

Avena is the third planet from the star. Like most of its planetary brethren in the system, Avena is tidally-locked. As such, it has a hot side facing the star, and a frozen side on the other side. Between these areas lay the habitable terminator line of the planet. Avena has a massive ocean covering most of the planet. Avena's atmosphere is thin, but breathable with minimal technological support.

Avena is an ocean world, with its surface mostly covered in water. Land is found in the form of islands and archipelago's, sporadically distributed around the planet. Its dark far side is covered in ice and snow, and its illuminated side is covered in a irregular boiling ocean, covered by steam clouds. On both sides of the terminator line there are continual storms and strong winds.

Avena has a thriving aquatic biosphere, with lots of maritime flora and microfauna around the terminator line.

Many Avenians lived on the dark half of the terminator line to protect themselves from the radiation emitted by the star. As such, they lived in a continual twilight, and Avenians adopted many cultural inspiration from Ancilican culture, as they also spent a large portion of their life in dark environments.

Due to having almost the same surface gravity as Valeris, Avena was a popular planet for Votos. While Avena's atmosphere was too thin for the birdlike Votos to support full flight, the Votos could use their wings to glide for short distances. Most Votos lived on the dark side of Avena, to match the temperature to that of their homeworld.

## Tynan

### Main inhabitants

HumansVotos

Ancilicae

## Physical characteristics

### Atmospheric composition

nitrogen-oxygen, pressure 1.3 atm

Tynan is the fourth planet from the star. Unlike most of its planetary bretheren, Tynan spins around its axis, creating a day/night cycle. Furthermore, it gave the planet a magnetosphere that protected its surface from the radiation emitted by the star. Tynan is a continental planet very akin to Earth or Ancilicus. For most sentient species, Tynan is excellently habitable, much like their homeworlds.

Tynan supports animal life, and many small creatures creatures inhabited the world before colonization by humanity and others.

Due to being the most populated planet, Tynan is the capital of the Trappist system, and is also called Trappist Prime because of this.

Tynan hosts extensive forests, including massive taiga's and rainforests. The planet is also covered in millions of lakes and hundreds of minor seas, all interconnected by water streams. Timid rainfall is the dominant weather type on Tynan, although most weather conditions are rather timid, and violent weather phenomena are rare.

Despite having a day/night cycle, Tynan is a very dark planet. Trappist gives off little light and mostly radiation energy. During daytime, the sky turns to a dark reddish orange color, but this is no brighter than twilight on Earth. Tynan's many planetary bretheren help in illuminating the planet, as each of the planets appear as noticable celestial objects in the sky, often as large as Luna is on Earth.

## Physical characteristics

### Mean temperature

-23 degrees celsius

Borealis is a tidally-locked tundra world.