Twilight

Overview

Located 21 light years from the Helyar, Twilight is the sixth planet orbiting the star HD 219134, also known as Bradley 3077 (Bradley 3077 4 in Space Engine 9.7.3). It is 11 billion years old. It is in a 2:1 resonance with the warm N-Class planet Esker (HD 219134 g), making a full revolution in around 188 days, and was discovered in 2039 CE via the radial velocity method.

It is a large, tidally-locked temperate oceanic terra. As one of the first habitable ocean worlds confirmed habitable after the invention of warp travel, Twilight was the source of a scientific "gold rush" in the late 2470s. Since then, the planet has gone largely unnoticed, with only a small research station and a handful of fishing outposts remaining.

Population

The first research station was founded on the icy terminator in 2478 by Stanford University. Several dozen other outposts were founded, with the planet reaching a peak population of 65,000 in 2485. As other, more diverse planets were discovered farther from Helyar, Twilight's popularity gradually fell. As of 10000, the only remaining scientific station (Harper Station) has a population of 2000.

In addition to scientific interest, a handful of fisheries were founded. Most of these are completely automated, however, there are a few families which have maintained them for generations. Most of the fisheries are floating platforms in warmer regions of the planet. The people receive supplies and send raw fish through the spaceport at Harper Station.

Climate

Harper Station is located on the frozen terminator

Twilight has an ESI of 0.884. It has a gravity of 1.17 g and an atmospheric pressure of 0.816 atm. The average planetary temperature is 25 °C, however, the temperature at Harper Station (on the terminator) is a chilly 5 °C. It has a breathable atmosphere due to the marine organisms which inhabit its ocean. There are no moons and therefore no tides on the planet.

The planet's climate has remained incredibly stable for most of its history. Due to this, many of the native species have remained relatively unchanged for several hundred million years. Fishing has had negligible impact on the planet's ecology due to low demand.