Xcathlia (Star Registry RS 8409-1353-7-1367695-188 1) is a warm E-Class planet in the Giyr star system. It has a diameter of 1.0106 Earths, and a mass 1.1485 times that of Earth. It resides 3.981 AU away from its star, Giyr, and a full revolution of its star takes 6.142 years. It rotates on its axis every 3.016 days. It has an ESI of 0.81091, and reside 693.4 light years (212.598 pc) from the Sol system.

Its average surface temperature is about 34 degrees Celsius, and it supports many varieties of organic, mulicellular life. Some varieties include the sea shelf mushroom and the Xcathli, a humanoid alien race that frequently dwells in small homes atop the high mountains of the planet. It has a single moon, Del'ai, which was discovered along with the planet by J.E. Fallows in 9314. Though little is known about the planet's past, it is believed to be approximately 8,314,000,000 years old.


Xcathlia through the SS Cardinal's tactical periscope. The lines visible are added by the periscope to guide the craft.

J.E. Fallows, who discovered the planet, did so in the SS Cardinal, a small spacecraft designed specifiaclly for missions throughout the Giyr star system. Of his first encounter with the planet, he wrote: "Though I have ventured through the universe for so long, never before had I seen a body carrying such bountiful life. Indeed it is an exceptional find, and this star system has the potential for plenty of them."


Carbon dating has identified small lifeforms that date back approximately 6 billion years, although water has been confirmed to have existed on Xcathlia's surface for 500 million years prior. Multicellular life originated approximately 4 billion years ago, with the powerful Gelacertanians first evolving about 700 million years later.



Cave drawings have been found inside the planet's Eichorn Mountains that date back to approximately 3,300,000,000 B.C, leading many to believe that this was the era in which the Gelacertanians first evolved. The species quickly spread across the planet, establishing mighty colonies and later cities. They were one of the first documented species to construct space vessels, which they used to colonize other worlds such as Pupra, where their civilzation exists to this day. 

Documents from the Gelacertanian civilzation suggests a massive extinction occured when the Krakhatan supervolcano erupted in 1,504,879,675 B.C. The resulting eruption was 100 times stronger than Krakatoa, causing Xcathlia's temperatures to fall by approximately 20 degrees Celsius (36 degrees Farenheit). The Gelacertanian population fell from 2 billion to only 10,000 in 6 months. Most of the cities were destroyed by the pyroclastic flow, as the Gelacertanians had built most of their civilizations around the supervolcano. The rest of them were covered in ash. 

Within 9 months of the eruption, the remaining Gelacertanian population had fallen to 5,000, who quickly evacuated Xcathlia. To this day, they have never returned.


For about 1.2 billion years, the only organisms on Xcathlia were single-celled microbes. Eventually, an ecosystem evolved from the ashes of the Gelacertanians. They were dubbed the Xcathli. Though they dwelled in caves for about 100 million years, they eventually began constructing small villages about 200 million years ago. By 100 million B.C, the planet was divided into two "clans": the Erdoks, and the Aryx. Conflict was frequent for 2 million years, when a great war erupted and wiped out most of the Aryx. 

A great time of peace ensued, with the Erdoks leading the way to great innovation. J.E. Fallows frequently compared them to our own Earth cilivization. These were some of the notes he made on the subject:

  • 90,000,000 B.C. was much like 5,000 B.C. on Earth  
  • 75,000,000 B.C. was much like 2,000 B.C. on Earth
  • 50,000,000 B.C. was much like the Roman Empire was on Earth
  • 25,000,000 B.C. was much like the Renaissance was on Earth
  • 1,000,000 B.C. was much like the 21st century on Earth 
  • 100,000 B.C. was much like the 5th millenium on Earth
  • 10,000 B.C. was much like the 7th millenium on Earth
  • 1 B.C. was much like 9,300 AD on Earth        

​In the 1st millenium AD, quantum looping was finally discovered. In the 2nd millenium, the Xcathli ascended to a Type II cilivization, specifically in 1345 AD. In 1675 AD, a Dyson Sphere, known as the Ercelon X, was constructed around Giyr A. In 1743, the Ercelon Y was constructed around Giyr B. By 1876 AD, antimatter power was being used to generate 95% of the civilzation's power. 

By 1920 AD, the Xcathli had become a type V-minus civilization as they developed techonolgy designed to control actomic nuclei. They then became a type VI-minus civilzation in 2144 AD. Finally, when time travel was discovered in 6512 AD, they became a type Omega-minus civilzation.

Over the past 4,000 years, the Xcathli had ascended to a level of divinity, with most of the universe's secrets pinpointed and discovered.


A sunset on Xcathlia.



Del'ai from Xcathlia's surface.

Community content is available under CC-BY-SA unless otherwise noted.