Twilight as seen from the initial scouting probe


Located 21 light years from the Sol System, Twilight is the fourth planet orbiting the star Bradley 3077 (Bradley 3077 4 in Space Engine 9.7.3). It is 9.0 billion years old.

It is a large, tidally-locked temperate O-Class world. As one of the first habitable ocean worlds discovered 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.

Like most tidally-locked oceanias, Twilight has a large continuous storm on its sunward hemisphere, and an enormous ice cap on the opposite side. There are no landmasses above the ocean surface.

There are no sentient species native to Twilight. However, it is home to a variety of simple fish and crab analogues which are compatible with Earth life.



Twilight's ice sheet meets its ocean

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 Sol, 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.



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.

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