The planet Paradigm is a tidally locked world orbiting the K type main sequence star called Ocheron, in the Oliis’arah binary star system. As a tidally locked world, one side of the planet is always facing the sun, the other side is always facing away from it, leaving a state of constant day one one side and constant night across on the other. Paradigm is larger than earth, but somewhat less dense, leading to an overall gravity slightly more than that of Earth, perhaps 1.05 gravities or so. The atmosphere is somewhat thicker than that of Earth, meaning it is easier to breath at higher altitudes. The unique situation Paradigm finds itself in has profound implications for the world.

There are no “polar” icecaps on Paradigm, rather, there is a single icecap on the far side of the planet, and it is very large indeed, twice as large as one would expect to find on a world of its size. The icecap varies somewhat in its size across the years, but has roughly reached an equilibrium point given current conditions. The cap is larger in places away from the ocean, and thinner and/or smaller closer to the planet’s oceans.

The conditions of constant day and constant night create predictable yet wild weather and current movement for the planet. The side always facing Ocheron is naturally much warmer than the side facing away from the star, and this affects wind and water patterns respectively. Because hot air tends to rise, the wind patterns of the planet go as follows: Air heats up on the Day side of the planet. It then rises, and is drawn towards the cooler side of the planet, the Night side, where it slowly falls back down and disperses, warming the night side in the process. Then, cool air from the night side flows near the surface towards the day side, where the air pressure is lower thanks to the greater temperature. This means that the lower atmosphere is cooler and flows towards the Day side, while the upper atmosphere is warmer, and flows towards the Night side. The reverse is true for the planet’s oceans. The water in the planets oceans near the surface on the Day side is much warmer, and tends to flow towards the night side near the surface. It cools off as it goes further on, until it reaches the night side where it finishes cooling off. Water from the night side flows deeper, and will travel to the warm side in deep ocean currents, where it is eventually warmed enough on the day side to flow to the surface again and continue the cycle. The results of these patterns mean that typically, land near the planet’s oceans tends to be warmer, thanks to the warm currents at the surface level of the water; whereas land away from the oceans and not protected by mountains or other terrain tends to be cooler, thanks to the cold surface air fronts from the dark side. This has a profound effect on the ecology of the planet, and determines which areas or more habitable or not.

Life on the Day Side- Life flourishes on the day side…

Life on the Night Side- Bleak and inhospitable, not much lives on the night side…

Life on the Terminator- A place of hardship, life on the terminator is never easy…

Paradigm has three moons: Numali, the greater of the three, Walaxxi, the closest of them, and lastly Pajarda, the smallest.


Day and Night/ Night and Day DonalGraeme