Source

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Source
aka Beta Corvi IV - Slylandro Homeworld
Orbit: 8.04 a.u. Mass: 295.8 e.s. Atmo: Super Thick Radius: 11.2 e.s. Temp: -156° c Gravity: 2.35 g. Weather: Class 8 Day: 0.59 days Tectonics: None Tilt: 5°
Gas Giant 1 satellite (a)

Source is the name the Slylandro have for their homeworld, the fourth planet in the Beta Corvi star system. It is the only known Gas Giant that has evolved life on it. Many species live on Source and one has even gained sentience: the Slylandro.

The Slylandro divide Source into three distinct regions: their world, the Depths, and Void. Their world consists of the 500 kilometer band of atmosphere where the Slylandro can survive with ease. Beneath their world lies the Depths where conditions become increasingly dark and hostile the deeper one goes. Traversing into the Depths leaves long-lasting tissue scars on or even ruptures the Slylandro's gas bags. Any large scale constructions of tools or weapons are eventually dragged into the Depths by their own weight. Void lies above their world. Slylandro become giddy and behave inappropriately in the rarefied atmosphere of Void.

Source's rotation period is also the basis the Slylandro timekeeping system. Since the Slylandro lack any form of physical technology, this method of keeping time has persisted throughout the history of their race.

The principle unit of time in this system is the Drahn, equivalent to four million rotations of their home planet. A Drahn is sub-divided into two thousand Drahnasa. For even smaller periods of time, the Slylandro simply use the rotations of their homeworld as a unit of time. The following is an approximate conversion factors between Slylandro and Human units of time:¹

• 1 rotation = 14.2 earth hours ≈ 0.592 earth days
• 1 Dranhasa ≈ 1180 earth days ≈ 3.24 earth years
• 1 Drahn ≈ 2370000 earth days ≈ 6480 earth years

In discussions with the Slylandro, they consistently make reference to events using these units of time. When converted to conventional units of time, the timing of these events corresponds fairly well with known historical findings — specifically, "3 Drahn ago" and "39 Drahn ago" yield nearly the same date as the other sources indicate. The following table lists these events with the Slylandro time and corresponding Human time:

Slylandro Time	Human Time	Event
a few hundred rotations	a few 59.2 days	time between visits of the Melnorme and The Captain
500 rotations	296 days	mission duration of Slylandro Probes
1 Drahnasa	3.24 years	time within which all The Captain's visits occur
half a Drahn	3240 years	length of time over which the Slylandro had contact with the Sentient Milieu
3 Drahn ago	19400 years	regular visits from the Ur-Quan during the Sentient Milieu era
3-4 Drahn	19400-25900 years	estimated lifespan of a Slylandro
39 Drahn ago	253000 years	last visit from the 'Shaggy Ones' (the Precursors)
41 Drahn ago	266000 years	first contact from the 'Shaggy Ones'
many thousands of Drahn	many 6480000 years	historical extent of Slylandro species

Notes and references

¹Information about Source's rotation period and historical events was originally presented in this forum thread as Star Control II fact #3. These numbers come from data which was never intended to be shown in the game. As such, the numbers presented here may not have been intended and may actually be purely coincidental. Regardless, they fit with what we know from other sources about the Star Control Timeline.