Deian

19.5% water (vapor)

1.1% nitrogen

trace amounts of hydrogen

trace amounts of Methane

trace amounts of Argon

trace amounts of Ammonia

trace amounts of nitric acid

trace amounts of neon

Deian is the third planet from Tarsis-1.

## In-Game Description

*“Deian is one of the smaller planets orbiting Tarsis-1, and one of the two planets known to host liquid water. Although the planet has water, Deian is only able to support liquid water due to its dense atmosphere. The dense atmosphere also allows Deian to support liquid water even on its dark side, allowing the planet to host a globe-spanning ocean that lacks any land. While Deian might be host to resources to support a colony or even life, scientists regard it as a "limited exploration only" world for now.”*

## Discovery

Deian was discovered via the Radial Velocity method.

## Physical Characteristics

Deian is a completely islandless world, with no land masses above water. It is often compared to Aquel, the fourth planet of Cer Turi. In fact, some Kerbal scientists have started calling Deian “a landless Aquel.” While the name admittedly needs some work, Diean is interesting nonetheless.

Deian’s low mass and high temperature should make it unable to hold the liquid water that is present on its surface. What scientists quickly discovered was that, similar to Belph, this planet’s atmospheric pressure increased the melting point of liquid water to above the surface temperature of 596 K. This has earned the planet a title, called a “Steam Planet,” a title it shares with Belph.

Deian has two very specific types of oceans. The first are called steam oceans, and they are known for the water vapor they release into the atmosphere. The second type are the temperate oceans, which are a lot more habitable and cooler in temperature as well. Further exploration of these oceans is recommended.

## Atmosphere and Climate

A few of Deian’s higher atmospheric layers have been shown to be breathable, though carbon dioxide in the lower atmosphere heats the planet up and dissipates the oxygen in Diean’s atmosphere to levels that would kill any Kerbal that traveled down that far without a helmet.

Deian has a sea level atmospheric pressure of between 20 and 30 atmospheres, allowing water to exist in a supercritical state. This supercritical water does not perform like any known state of matter. When experiments were done on Kerbin to simulate Diean’s atmospheric conditions, they discovered that the supercritical water acts more like a thick vapor than a liquid, which many Kerbal scientists claimed they had never witnessed before. Kerbals noted that this supercritical water is likely able to be compressed, which has led to confusion of where Diean’s sea level would truly be.

Deian is also the closest planet to Tarsis-1 with a fairly stable atmosphere, though Deian has frequent hurricanes and other intense weather systems that rip across the planet.

## Possibilities of Life

Deian was initially thought to be habitable, though that data was overridden when atmospheric scans came in that showed how inhospitable the atmosphere seemed to be.

That being said, Deian’s temperate oceans have fairly high possibilities of life, though exploration to these regions needs to be conducted to properly confirm if life is present.

## Biomes

* Poles
* Temperate Oceans
* Steamy Oceans